FIX: memcpy_76(): add support for non-ARM architectures
FIX: memcpy_76(): add support for non-ARM architectures

Before, memcpy_76() assumed ARM instruction set.  Add preprocessor
guards to use generic memcpy() if not on ARM.

Original patch had args to memcpy_76 backwards.

Change-Id: Ib5375e9de28ab6c2b348731dcdf282d6f7a529c1

parmv6/external_skia,parmv6/external_skia,parmv6/external_skia,Root-Box/external_skia,Root-Box/external_skia,Root-Box/external_skia,Root-Box/external_skia,parmv6/external_skia