Move DK_Misexpect for compatability with getNextAvailablePluginDiagnosticKind

First identified after D66324 landed.

Patch By: paulkirth
Differential Revision: https://reviews.llvm.org/D67648

llvm-svn: 372136

llvm/include/llvm/IR/DiagnosticInfo.h

@@ -74,9 +74,10 @@ enum DiagnosticKind {
   DK_LastMachineRemark = DK_MachineOptimizationRemarkAnalysis,
   DK_MIRParser,
   DK_PGOProfile,
+  DK_MisExpect,
   DK_Unsupported,
-  DK_FirstPluginKind,
-  DK_MisExpect
+  DK_FirstPluginKind // Must be last value to work with
+                     // getNextAvailablePluginDiagnosticKind
 };
 
 /// Get the next available kind ID for a plugin diagnostic.