build: pass XCODE_VERSION through to qt macOS cross compile conf

This should mostly be a no-op, however it would seem to make more sense
that we pass through the XCODE_VERSION we now have in depends, rather
than leaving the version set to 4.3.

depends/packages/qt.mk

@@ -125,6 +125,7 @@ $(package)_config_opts_darwin += -device-option MAC_SDK_VERSION=$(OSX_SDK_VERSIO
 $(package)_config_opts_darwin += -device-option CROSS_COMPILE="$(host)-"
 $(package)_config_opts_darwin += -device-option MAC_MIN_VERSION=$(OSX_MIN_VERSION)
 $(package)_config_opts_darwin += -device-option MAC_TARGET=$(host)
+$(package)_config_opts_darwin += -device-option XCODE_VERSION=$(XCODE_VERSION)
 endif
 
 $(package)_config_opts_linux  = -qt-xkbcommon-x11

depends/patches/qt/mac-qmake.conf

@@ -6,7 +6,7 @@ include(../common/gcc-base-mac.conf)
 include(../common/clang.conf)
 include(../common/clang-mac.conf)
 QMAKE_MAC_SDK_PATH=$${MAC_SDK_PATH}
-QMAKE_XCODE_VERSION=4.3
+QMAKE_XCODE_VERSION = $${XCODE_VERSION}
 QMAKE_XCODE_DEVELOPER_PATH=/Developer
 QMAKE_MACOSX_DEPLOYMENT_TARGET = $${MAC_MIN_VERSION}
 QMAKE_MAC_SDK=macosx