Fix regex & startsWith name lookup in SBTarget::FindGlobalVariables

There were two bugs here.

eMatchTypeStartsWith searched for "symbol_name" by adding ".*" to the
end of the symbol name and treati

Fix regex & startsWith name lookup in SBTarget::FindGlobalVariables

There were two bugs here.

eMatchTypeStartsWith searched for "symbol_name" by adding ".*" to the
end of the symbol name and treating that as a regex, which isn't
actually a regex for "starts with". The ".*" is in fact a no-op. When
we finally get to comparing the name, we compare against whatever form
of the name was in the accelerator table. But for C++ that might be
the mangled name. We should also try demangled names here, since most
users are going the see demangled not mangled names. I fixed these
two bugs and added a bunch of tests for FindGlobalVariables.

This change is in the DWARF parser code, so there may be a similar bug
in PDB, but the test for this was already skipped for Windows, so I
don't know about this.

You might theoretically need to do this Mangled comparison in

DWARFMappedHash::MemoryTable::FindByName

except when we have names we always chop them before looking them up
so I couldn't see any code paths that fail without that change. So I
didn't add that to this patch.

Differential Revision: https://reviews.llvm.org/D151940

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[lldb] Remove license headers from all test source files

Summary:
Around a third of our test sources have LLVM license headers. This patch removes those headers from all test
sources and also fixes

[lldb] Remove license headers from all test source files

Summary:
Around a third of our test sources have LLVM license headers. This patch removes those headers from all test
sources and also fixes any tests that depended on the length of the license header.

The reasons for this are:

* A few tests verify line numbers and will start failing if the number of lines in the LLVM license header changes. Once I landed my patch for valid SourceLocations in debug info we will probably have even more tests that verify line numbers.
* No other LLVM project is putting license headers in its test files to my knowledge.
* They make the test sources much more verbose than they have to be. Several tests have longer license headers than the actual test source.

For the record, the following tests had their line numbers changed to pass with the removal of the license header:
lldb-api :: functionalities/breakpoint/breakpoint_by_line_and_column/TestBreakpointByLineAndColumn.py
lldb-shell :: Reproducer/TestGDBRemoteRepro.test
lldb-shell :: Reproducer/TestMultipleTargets.test
lldb-shell :: Reproducer/TestReuseDirectory.test
lldb-shell :: ExecControl/StopHook/stop-hook-threads.test
lldb-shell :: ExecControl/StopHook/stop-hook.test
lldb-api :: lang/objc/exceptions/TestObjCExceptions.py

Reviewers: #lldb, espindola, JDevlieghere

Reviewed By: #lldb, JDevlieghere

Subscribers: emaste, aprantl, arphaman, JDevlieghere, lldb-commits

Tags: #lldb

Differential Revision: https://reviews.llvm.org/D74839

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[lldb][test] Remove symlink for API tests.

Summary: Moves lldbsuite tests to lldb/test/API.

This is a largely mechanical change, moved with the following steps:

```
rm lldb/test/API/testcases
mkdi

[lldb][test] Remove symlink for API tests.

Summary: Moves lldbsuite tests to lldb/test/API.

This is a largely mechanical change, moved with the following steps:

```
rm lldb/test/API/testcases
mkdir -p lldb/test/API/{test_runner/test,tools/lldb-{server,vscode}}
mv lldb/packages/Python/lldbsuite/test/test_runner/test lldb/test/API/test_runner
for d in $(find lldb/packages/Python/lldbsuite/test/* -maxdepth 0 -type d | egrep -v "make|plugins|test_runner|tools"); do mv $d lldb/test/API; done
for d in $(find lldb/packages/Python/lldbsuite/test/tools/lldb-vscode -maxdepth 1 -mindepth 1 | grep -v ".py"); do mv $d lldb/test/API/tools/lldb-vscode; done
for d in $(find lldb/packages/Python/lldbsuite/test/tools/lldb-server -maxdepth 1 -mindepth 1 | egrep -v "gdbremote_testcase.py|lldbgdbserverutils.py|socket_packet_pump.py"); do mv $d lldb/test/API/tools/lldb-server; done
```

lldb/packages/Python/lldbsuite/__init__.py and lldb/test/API/lit.cfg.py were also updated with the new directory structure.

Reviewers: labath, JDevlieghere

Tags: #lldb

Differential Revision: https://reviews.llvm.org/D71151

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