Revert recent bionic changes

Revert "Fix duplicate memchr inclusion"

This reverts commit 5e21cc0888a3bf281e0dbd189c8006c35e108528.

Revert "Fix build for x86. Remove duplicate mcmchr from Android.mk. Other implemented in arch-x86/x86.mk"

This reverts commit e0e4ad79583559802e7d7d6199c412371fc25bf4.

Revert "Revert "libc: add tegra2 TARGET_CPU_VARIANT""

This reverts commit 6c42e83f02a50c499dd737e869bf324ecc3ff593.

Revert "bionic: update memmove for 32 bits atomic"

This reverts commit 8ef69a2567cca35a02e9cb24fa7864ff160d901f.

Revert "Fix pthread_detach for already-exited threads."

This reverts commit 55ae6c7f002bbacd7843dc30120ad2f46b57f04d.

Revert "Upgrade to tzdata2014c."

This reverts commit 76cacaacd9112772ac0d2e95dc49f77d54b5627e.

Revert "Upgrade to tzdata2014b."

This reverts commit 0ba25515eb2b9411b95954ae6c510d0337f942d5.

Revert "libc: Fix memchr inclusion on scorpion"

This reverts commit 1e8738a2fc02b03ca081550d1e1eb50bdd132543.

Revert "libc: Fix memchr inclusion"

This reverts commit edcf8cd0b203eabdaf35af7b1dc64c632c5c5e50.

Revert "Import memchr implementation from cortex-strings for Cortex A15"

This reverts commit 023d4023445eb4a61778e33e82aeec25c9ab48d2.

Revert "Replace Cortex A15 strlen implementation with cortex-strings"

This reverts commit 5914b617b729c79c3ee6672d19df59163c375ee2.

Change-Id: I1844b76159478242ab524423072e5f17a64ee935