Fix serialization of uninstantiated exception specifications. Patch by Li Kan,
test by me.

llvm-svn: 155289
diff --git a/clang/lib/Serialization/ASTReader.cpp b/clang/lib/Serialization/ASTReader.cpp
index 06b42f3..fd0c171 100644
--- a/clang/lib/Serialization/ASTReader.cpp
+++ b/clang/lib/Serialization/ASTReader.cpp
@@ -3866,6 +3866,9 @@
       EPI.Exceptions = Exceptions.data();
     } else if (EST == EST_ComputedNoexcept) {
       EPI.NoexceptExpr = ReadExpr(*Loc.F);
+    } else if (EST == EST_Uninstantiated) {
+      EPI.ExceptionSpecDecl = ReadDeclAs<FunctionDecl>(*Loc.F, Record, Idx);
+      EPI.ExceptionSpecTemplate = ReadDeclAs<FunctionDecl>(*Loc.F, Record, Idx);
     }
     return Context.getFunctionType(ResultType, ParamTypes.data(), NumParams,
                                     EPI);