[compiler-rt][MSVC][CMake] Wrap Linker flags for ICX (llvm#118496)

RFC:
https://discourse.llvm.org/t/rfc-cmake-linker-flags-need-wl-equivalent-for-intel-c-icx-on-windows/82446

My previous pass missed some flags because I used
`-Werror=unknown-argument`, but `/D`, `/I` and `/O` are accepted by
clang (even when only linking), but mean different things than intended
for `link.exe`.

Author: Maetveis

compiler-rt/CMakeLists.txt

@@ -768,7 +768,7 @@ if (CMAKE_LINKER MATCHES "link.exe$")
   # it, but CMake doesn't seem to have a way to set linker flags for
   # individual static libraries, so we enable the suppression flag for
   # the whole compiler-rt project.
-  set(CMAKE_STATIC_LINKER_FLAGS "${CMAKE_STATIC_LINKER_FLAGS} /IGNORE:4221")
+  set(CMAKE_STATIC_LINKER_FLAGS "${CMAKE_STATIC_LINKER_FLAGS} ${CMAKE_CXX_LINKER_WRAPPER_FLAG}/IGNORE:4221")
 endif()
 
 add_subdirectory(include)

compiler-rt/lib/asan/CMakeLists.txt

@@ -141,7 +141,7 @@ append_list_if(COMPILER_RT_HAS_FTLS_MODEL_INITIAL_EXEC
 # LLVM turns /OPT:ICF back on when LLVM_ENABLE_PDBs is set
 # we _REALLY_ need to turn it back off for ASAN, because the way
 # asan emulates weak functions from DLLs requires NOICF
-append_list_if(MSVC "/DEBUG;/OPT:NOICF" ASAN_DYNAMIC_LINK_FLAGS)
+append_list_if(MSVC "LINKER:/DEBUG;LINKER:/OPT:NOICF" ASAN_DYNAMIC_LINK_FLAGS)
 
 set(ASAN_DYNAMIC_LIBS
   ${COMPILER_RT_UNWINDER_LINK_LIBS}