Add GCC-5.1 as a build toolchain

GCC 5.1 is now the oldest supported GCC by Linux. Add it as a
toolchain (TOOLCHAIN=gcc-5.1).

Keep 4.9 for the time being, but add a warning that it's
deprecated and will be dropped soon.

Change-Id: I0a6629a0f88d6f6b123542fc10ba087791a93630
Signed-off-by: Fuad Tabba <tabba@google.com>
1 file changed
tree: d74ebf140f1087a420d354369eebb1f333b3e11d
  1. aarch64/
  2. crosvm/
  3. cuttlefish/
  4. kvm-unit-tests/
  5. common.inc
  6. Makefile