Sync down FSF r184235@google/gcc-4_6_2-mobile branch

1) Get mostly new patches from FSF gcc-4.6 branch
2) Fix PR52129
3) Insert GNU-stack note for all ARM targets

Change-Id: I2b9926981210e517e4021242908074319a91d6bd
793 files changed
tree: 1b5f0d96c51b51168b3713058a1b62e92f1136eb
  1. gcc-4.2.1/
  2. gcc-4.3.1/
  3. gcc-4.4.0/
  4. gcc-4.4.3/
  5. gcc-4.6/