[BOLT][TEST] Use double dash flags in tests

Replace a single dash with a double dash for options that have more
than a single letter.

llvm-bolt-wrapper.py has special treatment for output options s

[BOLT][TEST] Use double dash flags in tests

Replace a single dash with a double dash for options that have more
than a single letter.

llvm-bolt-wrapper.py has special treatment for output options such as
"-o" and "-w" causing issues when a single dash is used, e.g. for
"-write-dwp". The wrapper can be fixed as well, but using a double dash
has other advantages as well.

Reviewed By: rafauler

Differential Revision: https://reviews.llvm.org/D127538

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[BOLT][TEST] Fix test failures on AArch64 builder

Address X86 tests failures on AArch64 builder:
https://lab.llvm.org/staging/#/builders/211/builds/82

Inputs fail to cross-compile due to a missing

[BOLT][TEST] Fix test failures on AArch64 builder

Address X86 tests failures on AArch64 builder:
https://lab.llvm.org/staging/#/builders/211/builds/82

Inputs fail to cross-compile due to a missing header:
```
/usr/include/stdio.h:27:10: fatal error: 'bits/libc-header-start.h' file not found
#include <bits/libc-header-start.h>
```

As inputs are linked with `-nostdlib` anyway, don't include stdio.h.

Reviewed By: yota9

Differential Revision: https://reviews.llvm.org/D124863

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[BOLT][test] Fix X86 cross-platform tests

Use target-specific flags for building X86 non-runnable tests.

Reviewed By: Amir

Differential Revision: https://reviews.llvm.org/D123072

[BOLT] Fix DWARFv5 for aarch64

This patch reverts patch "DWARFv5 default: Switch bolt tests to use
DWARFv4 since Bolt doesn't support v5 yet" and places the -gdwarf-4 flag
to the global cflags confi

[BOLT] Fix DWARFv5 for aarch64

This patch reverts patch "DWARFv5 default: Switch bolt tests to use
DWARFv4 since Bolt doesn't support v5 yet" and places the -gdwarf-4 flag
to the global cflags config file.

Reviewed By: Amir

Differential Revision: https://reviews.llvm.org/D118283

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DWARFv5 default: Switch bolt tests to use DWARFv4 since Bolt doesn't support v5 yet

Rough attempt to fix these, since I don't have bolt building locally.
Will see how the buildbots go with it...

[BOLT][TEST] Remove dependence on host_cc and host_cxx

Summary: Add dependency on clang and clangxx instead.

(cherry picked from FBD31128140)

[BOLT][NFC] Fix debug info printouts for inlined functions

Summary:
While printing debug info for instructions, we should use line tables
from the corresponding DWARF CU which could be different fro

[BOLT][NFC] Fix debug info printouts for inlined functions

Summary:
While printing debug info for instructions, we should use line tables
from the corresponding DWARF CU which could be different from the
containing function CU in case of inlined instructions.

(cherry picked from FBD28908324)

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