Use CLANG_LIB_DIR when trying to compile for 64-bit Windows ASan builds.
Use CLANG_LIB_DIR when trying to compile for 64-bit Windows ASan builds.

MozillaSecurity/funfuzz,nth10sd/funfuzz,MozillaSecurity/funfuzz,nth10sd/funfuzz,MozillaSecurity/funfuzz,nth10sd/funfuzz