ART: Fix debug output for bad reused MemMap.

Log the error_msg instead of a pointer to it.
Raise the log level to ERROR for the process maps.

(cherry picked from commit b5505823ad3d0bab8fc9c15c266a3d8cd96ee59e)

Change-Id: Ib0c258961e2384125907aca4bae2108f36067d5f
1 file changed