gcc: upgrade to gcc-10.3 version

gcc-10.2 in Hardknott branch has been upgraded to gcc-10.3 version
that includes many bug fixes.
Regression tested on X86-64, Arm and Aarch64 without issues.

Signed-off-by: pgowda <pgowda.cve@gmail.com>
Signed-off-by: Anuj Mittal <anuj.mittal@intel.com>