kbuild: Add libgcc.a directory to xtools search path

Informs the 'xtools' toolchain where to look for the libgcc.a library when
linking.

Change-Id: Ic990f1522dd8ddc9c5baf1366505e49929130969
Signed-off-by: Peter Mitsis <peter.mitsis@windriver.com>
1 file changed