Merge pull request #6500 from hughbe/mincore-windows

Fix linker errors for missing Win32 symbols linking swiftc.exe
diff --git a/lib/AST/CMakeLists.txt b/lib/AST/CMakeLists.txt
index 4a1fe45..6e8ff39 100644
--- a/lib/AST/CMakeLists.txt
+++ b/lib/AST/CMakeLists.txt
@@ -53,6 +53,7 @@
     swiftMarkup
     swiftBasic
 
+  INTERFACE_LINK_LIBRARIES
     # Clang dependencies.
     # FIXME: Clang should really export these in some reasonable manner.
     clangCodeGen