Added remotely ran compiler-rt tests.

[aorlov]

Summary

Use LLVM/utils/remote-exec.py to run compiler-rt tests remotely on the target.

[aorlov]

Disable compiler-rt crt tests for cross ARM builders since the tests are broken.

[vvereschaka]

LGTM

clang/cmake/caches/CrossWinToARMLinux.cmake

 
 set(CLANG_DEFAULT_LINKER                    "lld" CACHE STRING "")
 
 set(COMPILER_RT_BUILD_BUILTINS              ON CACHE BOOL "")
 set(COMPILER_RT_BUILD_SANITIZERS            OFF CACHE BOOL "")
 set(COMPILER_RT_BUILD_XRAY                  OFF CACHE BOOL "")
 set(COMPILER_RT_BUILD_LIBFUZZER             OFF CACHE BOOL "")
 set(COMPILER_RT_BUILD_PROFILE               OFF CACHE BOOL "")
+set(COMPILER_RT_BUILD_CRT                   OFF CACHE BOOL "")
 set(COMPILER_RT_DEFAULT_TARGET_ONLY         ON CACHE BOOL "")
+set(COMPILER_RT_INCLUDE_TESTS               ON CACHE BOOL "")
 
 set(LIBUNWIND_USE_COMPILER_RT               ON CACHE BOOL "")
 set(LIBUNWIND_TARGET_TRIPLE                 "${CMAKE_C_COMPILER_TARGET}" CACHE STRING "")
 set(LIBUNWIND_SYSROOT                       "${DEFAULT_SYSROOT}" CACHE STRING "")
 set(LIBUNWIND_ENABLE_SHARED                 OFF CACHE BOOL "")
 
 set(LIBCXXABI_USE_LLVM_UNWINDER             ON CACHE BOOL "")
 set(LIBCXXABI_ENABLE_STATIC_UNWINDER        ON CACHE BOOL "")

 find_package(Python3 COMPONENTS Interpreter)
 
 # Remote test configuration.
 if(DEFINED REMOTE_TEST_HOST)
   set(DEFAULT_TEST_EXECUTOR                 "\\\"${Python3_EXECUTABLE}\\\" \\\"${LLVM_PROJECT_DIR}/libcxx/utils/ssh.py\\\" --host='${REMOTE_TEST_USER}@${REMOTE_TEST_HOST}'")
   set(DEFAULT_TEST_TARGET_INFO              "libcxx.test.target_info.LinuxRemoteTI")
 
   # Allow override with the custom values.
+  if(NOT DEFINED COMPILER_RT_EMULATOR)
+    set(COMPILER_RT_EMULATOR                "\\\"${Python3_EXECUTABLE}\\\" \\\"${LLVM_PROJECT_DIR}/llvm/utils/remote-exec.py\\\" --execdir %%T --exec-pattern='.*\\.c.*\\.tmp.*' --host='${REMOTE_TEST_USER}@${REMOTE_TEST_HOST}'" CACHE STRING "")
+  endif()
   if(NOT DEFINED LIBUNWIND_TARGET_INFO)
     set(LIBUNWIND_TARGET_INFO               "${DEFAULT_TEST_TARGET_INFO}" CACHE STRING "")
   endif()
   if(NOT DEFINED LIBUNWIND_EXECUTOR)
     set(LIBUNWIND_EXECUTOR                  "${DEFAULT_TEST_EXECUTOR}" CACHE STRING "")
   endif()
   if(NOT DEFINED LIBCXXABI_TARGET_INFO)
     set(LIBCXXABI_TARGET_INFO               "${DEFAULT_TEST_TARGET_INFO}" CACHE STRING "")