Fix: "arm-linux" builds allow wrong GCC compiler

Change 	d80f856adf59 introduced a bug. It makes deployments targeting
the "arm-linux" environment accept non Linux specific GCC binaries like
"aarch64-none-elf-gcc". Since these GCC builds are not bundled with a
standard library built with Linux support, compilation errors arise due
to missing Linux kernel headers.

In addition this change fixes the GCC prefix triplet list for the “opeesp”
environment and allows using GCC built with “aarch64-none-linux“
triplet.

Change-Id: Ideff9f53dfe9080cd0ba24f75279a81532badb04
Signed-off-by: Gyorgy Szing <Gyorgy.Szing@arm.com>
2 files changed