[compiler-rt] Create the umbrella check-compiler-rt test target in non-standalone builds too

[mstorsjo]

Summary

I don't see why we can't have this target when built as a project alongside
llvm; especially in such build configs, it's useful to have one single target
for running all tests (in standalone builds, check-all does the same too),

Keep the creation of the check-all target only for standalone builds.

compiler-rt/test/CMakeLists.txt

if(NOT COMPILER_RT_STANDALONE_BUILD AND NOT LLVM_RUNTIMES_BUILD)
     endif()
   endif()
   # Tests use C++ standard library headers.
   if (TARGET cxx-headers OR HAVE_LIBCXX)
     list(APPEND SANITIZER_COMMON_LIT_TEST_DEPS cxx-headers)
   endif()
 endif()
 
-if(COMPILER_RT_STANDALONE_BUILD)
-  umbrella_lit_testsuite_begin(check-compiler-rt)
-endif()
 
 function(compiler_rt_test_runtime runtime)
   string(TOUPPER ${runtime} runtime_uppercase)
   if(COMPILER_RT_HAS_${runtime_uppercase})
     if (${runtime} STREQUAL scudo_standalone)
       add_subdirectory(scudo/standalone)
     else()
       add_subdirectory(${runtime})
if(COMPILER_RT_CAN_EXECUTE_TESTS)
   if(COMPILER_RT_BUILD_CRT)
     add_subdirectory(crt)
   endif()
   # ShadowCallStack does not yet provide a runtime with compiler-rt, the tests
   # include their own minimal runtime
   add_subdirectory(shadowcallstack)
 endif()
 
-if(COMPILER_RT_STANDALONE_BUILD)
-  # Now that we've traversed all the directories and know all the lit testsuites,
-  # introduce a rule to run to run all of them.
-  add_custom_target(compiler-rt-test-depends DEPENDS ${LLVM_COMPILER_RT_LIT_DEPENDS})
-  umbrella_lit_testsuite_end(check-compiler-rt)
 
+if(COMPILER_RT_STANDALONE_BUILD)
   if(NOT TARGET check-all)
     add_custom_target(check-all)
   endif()
   add_dependencies(check-all check-compiler-rt)
 endif()