define _USING_V110_SDK71_ when building with VS2013 against 7.1A SDK

and drop old VS2012 part from configure.ac

Change-Id: If0bedff0972a40f92aaf86140a0405d2af1dbc8d

configure.ac

@@ -3522,13 +3522,9 @@ if test "$_os" = "WINNT"; then
             # are always "better", we list them in reverse chronological order.
 
             case $vcnum in
-            110)
-                COMEX=14
-                WINDOWS_SDK_ACCEPTABLE_VERSIONS="8.0 7.1A"
-                ;;
             120)
                 COMEX=15
-                WINDOWS_SDK_ACCEPTABLE_VERSIONS="8.1A 8.1 8.0"
+                WINDOWS_SDK_ACCEPTABLE_VERSIONS="8.1A 8.1 8.0 7.1A"
                 ;;
             esac
 

solenv/gbuild/platform/com_MSC_defs.mk

@@ -47,7 +47,7 @@ gb_COMPILERDEFS := \
 	-D_MT \
 	-D_DLL \
 	-DCPPU_ENV=$(gb_CPPU_ENV) \
-	$(if $(findstring 110_70,$(VCVER)_$(WINDOWS_SDK_VERSION)),-D_USING_V110_SDK71_) \
+	$(if $(findstring 120_70,$(VCVER)_$(WINDOWS_SDK_VERSION)),-D_USING_V110_SDK71_) \
 
 ifeq ($(CPUNAME),INTEL)
 gb_COMPILERDEFS += \