Fix flags in TARGET_linux-arm.mk...

This is a modified version of the original SaberMod code style
cleanup TARGET_linux-arm.mk from last commit..

Fix derps
Update TARGET_linux-arm.mk

If the flag -fstrict-aliasing is set to global use warning level three automatically.
Update TARGET_linux-arm.mk

opps
Fix flags in select.mk

same modifications as in LINUX_target-arm.mk