Merge pull request swiftlang#79443 from compnerd/hermermetic

Runtimes: add `-nostdlibimport` to the runtime build

Author: compnerd

Runtimes/Core/CMakeLists.txt

@@ -172,6 +172,7 @@ add_compile_options(
 add_link_options($<$<PLATFORM_ID:Windows>:LINKER:/WX>)
 
 add_compile_options(
+  "$<$<COMPILE_LANGUAGE:Swift>:-nostdlibimport>"
   "$<$<COMPILE_LANGUAGE:Swift>:SHELL:-library-level api>"
   "$<$<COMPILE_LANGUAGE:Swift>:SHELL:-runtime-compatibility-version none>"
   "$<$<COMPILE_LANGUAGE:Swift>:-disable-autolinking-runtime-compatibility-dynamic-replacements>"