qt: broken on avr32

Qt is broken for the avr32 architecture since it lacks TLS support.
Fixes:
http://autobuild.buildroot.net/results/56d/56d1d8f12a847f1ba49547a51d7a3605755a0bb8/

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

package/opencv/Config.in

@@ -167,6 +167,7 @@ config BR2_PACKAGE_OPENCV_WITH_PNG
 config BR2_PACKAGE_OPENCV_WITH_QT
 	bool "qt backend support"
 	depends on BR2_INSTALL_LIBSTDCPP
+	depends on !BR2_avr32 # qt
 	select BR2_PACKAGE_QT
 	select BR2_PACKAGE_QT_STL
 	default y

package/qt/Config.in

@@ -3,6 +3,7 @@ comment "qt requires a toolchain with C++ support enabled"
 
 menuconfig BR2_PACKAGE_QT
 	bool "Qt"
+	depends on !BR2_avr32 # lacks TLS
 	depends on BR2_INSTALL_LIBSTDCPP
 	help
 	  Qt is a cross-platform application and UI framework for