x86/mips: enable _FORTIFY_SOURCE=2

Enable _FORTIFY_SOURCE=2 for x86 and MIPS.

Currently, this change is a no-op, as Android's libc doesn't
support _FORTIFY_SOURCE > 1, yet.

The ARM change was made in 316f720b91f879c4e3972d6d595535de0ac707b2

Change-Id: Iafe90beadf9b6a41ea294b7107cf4f18141acf3a
2 files changed