Merge pull request swiftlang#78520 from edymtt/edymtt/use-defaults-when-building-stdlib-in-release-with-debug-info-for-apple-platforms

[CMake stdlib] do not override flags for `RelWithDebInfo` when ...

Author: edymtt

Runtimes/Core/cmake/caches/Vendors/Apple/apple-common.cmake

@@ -12,7 +12,3 @@ set(SwiftCore_ENABLE_VECTOR_TYPES ON CACHE BOOL "")
 set(SwiftCore_ENABLE_RUNTIME_FUNCTION_COUNTERS ON CACHE BOOL "")
 set(SwiftCore_ENABLE_BACKDEPLOYMENT_SUPPORT ON CACHE BOOL "")
 set(SwiftCore_ENABLE_FILESYSTEM_SUPPORT ON CACHE BOOL "")
-
-set(CMAKE_CXX_FLAGS_RELWITHDEBINFO "-O3 -gline-tables-only -DNDEBUG" CACHE STRING "")
-set(CMAKE_C_FLAGS_RELWITHDEBINFO "-O3 -gline-tables-only -DNDEBUG" CACHE STRING "")
-set(CMAKE_Swift_FLAGS_RELWITHDEBINFO "-O -gline-tables-only" CACHE STRING "")