Switch to current FreeBSD qsort.

Change-Id: Ic46cd0b663dc5fa78c99dd38db0bfe849a25e789
Use hidden visibility for internal-use-only functions

 - malloc_debug_init and malloc_debug_fini

Change-Id: I4261ff428a50d8f0371415cda71bcc0a9487ce67
Rewrite memset for cortexa15 to use strd.

Merge from internal master.

(cherry-picked from commit 7ffad9c120054eedebd5f56f8bed01144e93eafa)

Change-Id: Ia67f2a545399f4fa37b63d5634a3565e4f5482f9
Merge "Switch to current FreeBSD qsort."
Merge "Rewrite memset for cortexa15 to use strd."
Merge "Use hidden visibility for internal-use-only functions"
Merge remote-tracking branch 'aosp/master'