Update notes for submitted changes

* libm: sync with upstream freebsd
* [ARM] libc: define return and conditional return macros
* [ARM] libc: optimized strnlen, strncat, strncmp, and strlcat
* libc stdlib: implement C99 _Exit and C11 quick_exit API
* libc: support __errno_location
* Make use of new memcpy, tweak settings
* libm: add fmal long double stub