RFR(s): 8079148: Fix incorrect include guards

[Per Liden]

Small cleanup of incorrect/misspelled/missing include guards. Affects 
the following GC and runtime files:

src/share/vm/gc_implementation/concurrentMarkSweep/adaptiveFreeList.hpp
src/share/vm/gc_implementation/g1/evacuationInfo.hpp
src/share/vm/gc_implementation/g1/g1GCPhaseTimes.hpp
src/share/vm/gc_implementation/g1/g1RootProcessor.hpp
src/share/vm/gc_implementation/g1/heapRegionBounds.inline.hpp
src/share/vm/gc_implementation/shared/objectCountEventSender.hpp
src/share/vm/memory/guardedMemory.hpp
src/share/vm/memory/metaspaceChunkFreeListSummary.hpp
src/share/vm/memory/metaspaceGCThresholdUpdater.hpp
src/share/vm/memory/metaspaceShared.hpp
src/share/vm/memory/metaspaceTracer.hpp
src/share/vm/memory/padded.inline.hpp
src/share/vm/memory/referenceType.hpp

Webrev: http://cr.openjdk.java.net/~pliden/8079148/webrev.0/
Bug: https://bugs.openjdk.java.net/browse/JDK-8079148

/Per