[11] RFR(S) 8207069: [AOT] we should check that VM uses the same GC as one used for AOT library generation.

[Vladimir Kozlov]

Including GC group since I added new method to GCConfig.

http://cr.openjdk.java.net/~kvn/8207069/webrev.00/
https://bugs.openjdk.java.net/browse/JDK-8207069

Recent Graal's changes [1] added list of GC [2] which matches Hotspot GC list [3].
I used that to fix this issue by storing enum value from Graal in AOT config header and compare it 
with selected GC when AOT library is loaded into Hotspot.

I verified the fix with all GCs combination when compiling AOT lib and using it. I also ran our 
hs-tier1-3 testing which includes AOT and Graal tests.

These changes are for JDK 11 so I don't need to go through Graal PR now but I would need to do that 
for JDK 12 to make changes in AOT code.

Thanks,
Vladimir

[1] https://bugs.openjdk.java.net/browse/JDK-8205824
   "[GR-10514] Use whitelist for GCs supported by Graal"
[2] 
http://hg.openjdk.java.net/jdk/jdk11/file/bf686c47c109/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.hotspot/src/org/graalvm/compiler/hotspot/HotSpotGraalRuntime.java#l137
[3] 
http://hg.openjdk.java.net/jdk/jdk11/file/bf686c47c109/src/hotspot/share/gc/shared/collectedHeap.hpp#l173