Add -fpermissive to aarch
Adds WTF platform support for the AArch64 architecture.

Patch is based on WebKit-gtk patch done by Riku Voipio, and was
cherry-picked and tested by Marcin Juszkiewicz.

Task-number: QTBUG-35442
Add ppc/ppc64 to build
Add ppc/ppc64 to build
Add support for mips64