[Gnu-efi-discuss] Use CFLAGS with "gcc -print-libgcc-file-name" to get the right one

[Richard H. <hug...@gm...>]

This makes us use CFLAGS when trying to find libgcc, so we don't get the
one with the wrong endian or float ABI.

Signed-off-by: Peter Jones <pj...@re...>

Original patch is by Peter Jones, sent with permission.

Richard.