fmt: Use libgcc on x86
fmt: Use libgcc on x86

This is because compiler-rt does not provide int128 builtins which fmt
uses

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

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