Win32: compile correctly UAC.dll

(cherry picked from commit 4b95124b5f832861294c18c4e3cfb377d6f72636)
Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>

extras/package/win32/package.mak

@@ -140,7 +140,7 @@ if HAVE_WIN64
 	i686-w64-mingw32-g++ $^ -shared -o $@ -lole32
 	i686-w64-mingw32-strip $@
 else
-	$(CXX) $^ -shared -o $@ -lole32
+	$(CXX) $^ -D_WIN32_IE=0x0601 -D__forceinline=inline -shared -o $@ -lole32
 	$(STRIP) $@
 endif