Merge pull request #115 from bensander/README

Update release notes.

[ROCm/hip commit: 5589c59605]

projects/hip/RELEASE.md

@@ -5,6 +5,10 @@ We have attempted to document known bugs and limitations - in particular the [HI
 
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+Upcoming:
+- HIP development now fully open and on GitHub. Developers should submit pull requests.
+
+
 ## Revision History:
 
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