tools: Display correct name for rcar's compiler
Created by: nicola-mazzucato-arm
In tools/ci.py we build rcar platform with aarch64-none-elf-gcc, but we display it as 'ARM'.
Correct this by replacing ARM with GCC-AArch64.
Change-Id: I7c4de86f6cd4a2a007263703edee7a7c71dfa8f6 Signed-off-by: Nicola Mazzucato nicola.mazzucato@arm.com