This keeps the test behavior unchanged when CLANG_DEFAULT_PIE_ON_LINUX switches
to ON by default.
Note: current clang --target=mips64el-linux-gnu -fpie -pie -fuse-ld=lld
does not link with C++ exceptions, using -pie would lead to
```
ld.lld: error: cannot preempt symbol: DW.ref.__gxx_personality_v0
...
ld.lld: error: relocation R_MIPS_64 cannot be used against local symbol; recompile with -fPIC
...
```
when linking `ScudoUnitTests`: https://lab.llvm.org/buildbot/#/builders/169/builds/7311/steps/18/logs/stdio
${COMPILER_RT_UNITTEST_LINK_FLAGS}
${SANITIZER_TEST_CXX_LIBRARIES}
)
-list(APPEND LINK_FLAGS -pthread)
+list(APPEND LINK_FLAGS -pthread -no-pie)
# Linking against libatomic is required with some compilers
check_library_exists(atomic __atomic_load_8 "" COMPILER_RT_HAS_LIBATOMIC)
if (COMPILER_RT_HAS_LIBATOMIC)