[build] don't embed bitcode for target libs built for simulators (#32871)

At the same time rework condition so that it is more amenable to code
searches.

Addresses rdar://65501878

Author: edymtt

stdlib/cmake/modules/AddSwiftStdlib.cmake

@@ -1251,7 +1251,9 @@ function(_add_swift_target_library_single target name)
     endif()
     # Include LLVM Bitcode slices for iOS, Watch OS, and Apple TV OS device libraries.
     if(SWIFT_EMBED_BITCODE_SECTION AND NOT SWIFTLIB_SINGLE_DONT_EMBED_BITCODE)
-      if(${SWIFTLIB_SINGLE_SDK} MATCHES "(I|TV|WATCH)OS")
+      if(${SWIFTLIB_SINGLE_SDK} STREQUAL "IOS" OR
+         ${SWIFTLIB_SINGLE_SDK} STREQUAL "TVOS" OR
+         ${SWIFTLIB_SINGLE_SDK} STREQUAL "WATCHOS")
         # Please note that using a generator expression to fit
         # this in a single target_link_options does not work
         # (at least in CMake 3.15 and 3.16),