Docs: Making source.android.com headers match those of developer.android.com

Bug: 17814801
Change-Id: I128a76b32b0d92118f621062c62d72460313f4d6
Add -fPIC as default Clang mips ASFLAGS.

For mips target, gcc passes -KPIC to assembler by default,
but clang passes -KPIC only if -fPIC or -fpic is given.

BUG: 17895505
Change-Id: I7803adaf8ad7b40c6473872b67f4e0b4c502b38a
Merge "Add -fPIC as default Clang mips ASFLAGS."
Merge "Docs: Making source.android.com headers match those of developer.android.com"