[11] 8181855: [Graal] runtime/ReservedStack/ReservedStackTest.java triggers: assert(thread->deopt_mark() == __null) failed: no stack overflow from deopt blob/uncommon trap

[dean.long at oracle.com]

http://cr.openjdk.java.net/~dlong/8181855/webrev/
https://bugs.openjdk.java.net/browse/JDK-8181855

This change adds "reserved stack" support to Graal for SPARC, x64, and 
AArch64.
This change has already gone upstream into Graal, except for the AOT 
change in aotCodeHeap.cpp.

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