Cherry-pick more 7.11 changes to 8.3

Cherry-picked commits:
    b711aa8: Add Unix domain socket support to gdbserver 7.9.1.

The upstream domain socket change actually get reverted.
Original upstream change: f19c7ff839d7a32ebb48482ae7d318fb46ca823d
Reverted in: 80e24d09860dbeba7d435b4a4f0990f85dbc084e

Test: build
Bug: 62547070
Change-Id: I574cc11792fac018453e05d82fd835c4d45de7c1
1 file changed
tree: 9783bf39b45d5dd61c72cf629135c02fd790f211
  1. gdb-7.11/
  2. gdb-8.0.1/
  3. gdb-8.2/
  4. gdb-8.3/
  5. build-gdb.sh
  6. build.py