Describe OpenCL C changes
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@194368 91177308-0d34-0410-b5e6-96231b3b80d8
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+OpenCL C Language Changes in Clang
+----------------------------------
+
+- OpenCL C "long" now always has a size of 64 bit, and all OpenCL C
+ types are aligned as specified in the OpenCL C standard. Also,
+ "char" is now always signed.
+
Internal API Changes
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