linaro stuff

Change-Id: Ia2a9c7256ca7101b7cc6d38c84a4fdfbdca994a9
customized rules for linaro building

Change-Id: I107b38a087d748aac7a1770b1ddfc9f68b824409
Fixed auto-setup of linaro toolchain when mklinaro is called

Change-Id: I9191d761e758193aae0d8a8f7a6a3ea11002ef80
make mklinaro pass args through to mka
and rm -f tars instead of rm to prevent naggy prompts.

Change-Id: If98932f700db8aab7bd80fe55847e7be42cb01ce
add back product build_prop_overrides, and FORTIFY_SOURCE for x86 targets

Change-Id: I675d0cddb99d14d5351ebd76de8b858c435e3965
Merge mklinaro into mka

Change-Id: Id8bdff662b427cacbb94c7c7ce464e315d6d1f5e
Consolidate differences with jb42 -- seems to be a noop in most cases

Change-Id: I05c3a75eb2168b5fbac32a8a39e40b52be08905c
Reduce legwork entailed by .mk hunting

Change-Id: Ib428371083ca072b5166c2c11306ab5c384bcc76