Add missing CINDEX_LINKAGE

Follow up for [libclang] Add PrintingPolicy for pretty printing declarations

Differential Revision: https://reviews.llvm.org/D39903

llvm-svn: 322546
diff --git a/clang/include/clang-c/Index.h b/clang/include/clang-c/Index.h
index 0c90468..f1a58f8 100644
--- a/clang/include/clang-c/Index.h
+++ b/clang/include/clang-c/Index.h
@@ -4136,16 +4136,16 @@
 /**
  * \brief Get a property value for the given printing policy.
  */
-unsigned
+CINDEX_LINKAGE unsigned
 clang_PrintingPolicy_getProperty(CXPrintingPolicy Policy,
                                  enum CXPrintingPolicyProperty Property);
 
 /**
  * \brief Set a property value for the given printing policy.
  */
-void clang_PrintingPolicy_setProperty(CXPrintingPolicy Policy,
-                                      enum CXPrintingPolicyProperty Property,
-                                      unsigned Value);
+CINDEX_LINKAGE void clang_PrintingPolicy_setProperty(CXPrintingPolicy Policy,
+                                                     enum CXPrintingPolicyProperty Property,
+                                                     unsigned Value);
 
 /**
  * \brief Retrieve the default policy for the cursor.