ART: Fix arm mterp shadow handling

The shadow frame conventions for the interpreter require that any
time a virtual register is set, a corresponding shadow register
must also be set (cleared if non-reference).  The arm Mterp
implementation was failing to do this for some 64-bit operations.

Change-Id: Iee174d54318bf6ebb677966ad020d8cbe578986c
21 files changed