Use __unused instead of UNUSED in linker.cpp

 - sys/cdefs.h already define __unused, just use it
   instead of define a local one.

Change-Id: Iacf3da9193e65e1f34b12760b28bcb64b67cb790
add 32-bit bionic implementation for denver arch

Add 32-bit bionic implementation for denver. Use denver version of memcpy/
memset. Use Cortex-A15 version of strlen/strcat/strcpy/strcmp.

Change-Id: I4c6b675f20cf41a29cadf70a11d1635d7df5b30a
Merge "Use __unused instead of UNUSED in linker.cpp"
Merge "add 32-bit bionic implementation for denver arch"