VS2013: Adjust glew to 12.0 vcproj version

Change-Id: Ibfb6f7d23c0f3afbd7ef810093dbbec7f9134aaa
Reviewed-on: https://gerrit.libreoffice.org/10160Reviewed-by: Michael Stahl <mstahl@redhat.com>
Tested-by: Michael Stahl <mstahl@redhat.com>

external/glew/ExternalProject_glew.mk

@@ -17,7 +17,8 @@ ifeq ($(COM),MSC)
 $(call gb_ExternalProject_get_state_target,glew,build) :
 	$(call gb_ExternalProject_run,build,\
 		msbuild.exe glew_shared.vcxproj /p:Configuration=$(if $(MSVC_USE_DEBUG_RUNTIME),Debug,Release) \
-		$(if $(filter 110 120,$(VCVER)),/p:PlatformToolset=$(if $(filter 80,$(WINDOWS_SDK_VERSION)),v110,v110_xp) /p:VisualStudioVersion=11.0) \
+		$(if $(filter 110,$(VCVER)),/p:PlatformToolset=$(if $(filter 80,$(WINDOWS_SDK_VERSION)),v110,v110_xp) /p:VisualStudioVersion=11.0) \
+		$(if $(filter 120,$(VCVER)),/p:PlatformToolset=v120 /p:VisualStudioVersion=12.0) \
 	,build/vc10)
 
 else