gcc 4.9.1: add patch for PR60102

Fixes ICE for SPE ABI, see:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=60102



And re-enable gcc 4.9.1 for SPE.

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>