Revert "Bionic: Add AOSP master cortex optimizations"

This reverts commit 456c0e8cbe4ed2da25317e8e46ed327a14fbeb1c.

Conflicts:
	libc/arch-arm/arm.mk
	libc/arch-arm/cortex-a15/bionic/strlen.S
	libc/arch-arm/cortex-a15/cortex-a15.mk
	libc/arch-arm/cortex-a9/cortex-a9.mk
	libc/arch-arm/generic/generic.mk
	libc/arch-arm/krait/krait.mk

	modified:   libc/NOTICE
	modified:   libc/arch-arm/arm.mk
	modified:   libc/arch-arm/bionic/libgcc_compat.c
	deleted:    libc/arch-arm/bionic/memcpy.a9.S
	renamed:    libc/arch-arm/generic/bionic/strlen.c -> libc/arch-arm/bionic/strlen.c
	modified:   libc/arch-arm/cortex-a15/cortex-a15.mk
	modified:   libc/arch-arm/cortex-a9/cortex-a9.mk
	modified:   libc/arch-arm/generic/generic.mk
	modified:   libc/arch-arm/krait/krait.mk