ART: Intrinsic implementation for java.lang.System.arraycopy.

ART: Intrinsic implementation for java.lang.System.arraycopy.

Implements intrinsic for  java.lang.System.arraycopy(char[], int, char[], int, int) -
this method is internal to android class libraries and used in such classes as StringBuffer and
StringBuilder. It is not possible to call it from application code. The intrinsic for
this method is implemented as inline method (assembly code is generated manually).

The intrinsic is x86 32 bit only.

Change-Id: Id1b1e0a20d5f6d5f5ebfe1fdc2447b6d8a515432
Signed-off-by: Daniil Sokolov <daniil.y.sokolov@intel.com>