[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] Remove -no-pie from cflags/cxxflags

Align with an upstream change D120305 to make PIE the default on linux-gnu.

Add `-no-pie` to tests that require it.

Reviewed By: maksfb, yota9

Dif

[BOLT][TEST] Remove -no-pie from cflags/cxxflags

Align with an upstream change D120305 to make PIE the default on linux-gnu.

Add `-no-pie` to tests that require it.

Reviewed By: maksfb, yota9

Differential Revision: https://reviews.llvm.org/D123329

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[BOLT][TEST] Split runtime tests into test/runtime folder

Summary:
Create bolt/test/runtime folder and move tests that execute the binary.
Move lit.local.cfg with host_arch check to the correspondin

[BOLT][TEST] Split runtime tests into test/runtime folder

Summary:
Create bolt/test/runtime folder and move tests that execute the binary.
Move lit.local.cfg with host_arch check to the corresponding folder.
Addresses issue facebookincubator/BOLT#132.

AArch64/tls.c shows a different behavior with clang hence marked as XFAIL

TODO: add a check for non-exec tests for a corresponding LLVM_TARGETS_TO_BUILD.

(cherry picked from FBD31132234)

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