COMPMID-417 Use aarch64-elf and arm-eabi toolchains

Change toolchain for arm64-v8a and armv7a and disable
examples when building for bare_metal.

Change-Id: I09c22cc9aad4d32a8e521c36fec98acad2b4d855
Reviewed-on: http://mpd-gerrit.cambridge.arm.com/90207
Tested-by: Kaizen <jeremy.johnson+kaizengerrit@arm.com>
Reviewed-by: Anthony Barbier <anthony.barbier@arm.com>
2 files changed