Update notes for submitted changes

* libc: krait: Re-factor high-performance memcpy for thumb2
* libm: krait: Fix build warning for e_pow.o
* Bionic/libm: Remove extra vmov from sin/cos.
* Bionic/libm: enable optimized math functions on more QCOM targets.
* libm: optimistic pow calling.
* libm: sqrt and sqrtf via ARM vsqrt instruction
* Bionic/libm: add assembly versions of sin/cos.
* Bionic/libm: Pow optimizations and bug fixes.
* Bionic/libm: Add precision-correct de-serialize sin/cos.
* Bionic/libm: Prefer branches and VFP ABI.
* Bionic/libm: fast neon pow() for small x,y.