Switch to medium compiler

Switch to medium compiler

The cyclone 5 is a cortex-a9 thus switch to the
matching compiler profile within AGL.

Change-Id: I19d695c653cc78c53dfce7a1adc27e7629256296
Signed-off-by: Jan-Simon Möller <jsmoeller@linuxfoundation.org>
Reviewed-on: https://gerrit.automotivelinux.org/gerrit/9327
Tested-by: Jenkins Job builder account <agl-jobbuilder@automotivelinux.org>
ci-image-build: Jenkins Job builder account <agl-jobbuilder@automotivelinux.org>
Reviewed-by: Scott Murray <scott.murray@konsulko.com>
Reviewed-by: Matt Ranostay <matt.ranostay@konsulko.com>