RFR: 8227068: [Graal] MappedByteBuffer bulk access memory failures are not handled gracefully

[Jamsheed]

Hi,

Request for review

JDK-8191278 guarded c2 compiler Unsafe.copyMemory intrinsic for invalid 
memory access failures. this was not done for graal compiler intrinsic.

this patch handles graal case.

jbs: https://bugs.openjdk.java.net/browse/JDK-8227068

webrev: http://cr.openjdk.java.net/~jcm/8227068/webrev.00/

tested: graal unittests, mach5 (1-5, tests running)

aot failing test: manually verified.

Best regards,

Jamsheed