llvm-config: Replace TARGET_* flags with normal equivalent flags
llvm-config: Replace TARGET_* flags with normal equivalent flags

TARGET_* are not exported in recipes and hence are not available to this
script during build.

Signed-off-by: Khem Raj <729d64b6f67515e258459a5f6d20ec88b2caf8df@gmail.com>

kraj/meta-clang,kraj/meta-clang,kraj/meta-clang