Build: Specify compiler version in every configs

To make build configs more flexible in Open CI,
specify compiler version in each configs.
This patch makes it possible to build same config
with different versions of compiler.

Signed-off-by: Xinyu Zhang <xinyu.zhang@arm.com>
Change-Id: I88eb3e927f85731376b5a0de08533765f7b8b535
6 files changed