RFR (XXS): 8153193: Missing includes in gc/g1/heapRegionBounds.hpp

[Thomas Schatzl]

Hi all,

  can I have quick reviews for this change that adds a missing include
to the file in question?

The HeapRegionBounds class inherits from AllStatic, which is in
memory/allocation.hpp that is not included. Some future changes break
because of this oversight.

For current sources there is no difference.

Note that strictly we should probably also include stddef.h for size_t,
but looking through other sources, this is (almost) never done. So I
refrained from doing so here too.

CR:
https://bugs.openjdk.java.net/browse/JDK-8153193
Webrev:
http://cr.openjdk.java.net/~tschatzl/8153193/webrev/
Testing:
local testing

Thanks,
  Thomas