Port aosp commits from:

https://android.googlesource.com/toolchain/gcc/+/85f026f337499654a77d32ca68929fd5d456000e
and
https://android.googlesource.com/toolchain/gcc/+/fc15d1b02c98adf983a1e5cba0b82873326ababc

Signed-off-by: Paul Beeler <pbeeler80@gmail.com>
Port:

[gcc] Remove "-mstackrealign" option turned on by default on x86.

Please refer to:
https://android.googlesource.com/toolchain/gcc/+/b871d9129b49f905bee587381bdb224159754b76%5E%21/#F5

Signed-off-by: Paul Beeler <pbeeler80@gmail.com>