8025856: Fix typos in the GC code

Fix about 440 typos in comments in the VM code

Reviewed-by: mgerdin, tschatzl, coleenp, kmo, jcoomes

hotspot/src/share/vm/gc_implementation/shared/parGCAllocBuffer.hpp

@@ -92,7 +92,7 @@ public:
   }
 
   // The total (word) size of the buffer, including both allocated and
-  // unallocted space.
+  // unallocated space.
   size_t word_sz() { return _word_sz; }
 
   // Should only be done if we are about to reset with a new buffer of the