Add linaro 4.7.2 toolchain

Change-Id: Ibccad4f23c7784286a32637239530a5142acc412
Signed-off-by: Simon Busch <morphis@gravedo.de>
Update manifest

* use own branch for frameworks/native
* don't use linaro toolchain

Change-Id: If087cbc26c00dd908ca407c46f6169b0e796acee
Signed-off-by: Simon Busch <morphis@gravedo.de>