qt5jsbackend: needs ARM v5+

Just like nodejs and other v8-based javascript engines for ARM interwork
it needs the BLX instruction which is only available on V5+ cores.
Fixes:
http://autobuild.buildroot.net/results/853/853cd29bf427902b2cb82a101964a4e45714cb86/

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/qt5/qt5jsbackend/Config.in

@@ -2,6 +2,8 @@ config BR2_PACKAGE_QT5JSBACKEND_AVAILABLE
 	bool
 	# v8 is only available on certain architectures
 	depends on BR2_arm || BR2_i386 || BR2_x86_64 || BR2_mipsel
+	# ARM needs BLX, so v5t+
+	depends on !(BR2_arm7tdmi || BR2_arm720t || BR2_arm920t || BR2_arm922t || BR2_fa526)
 	default y
 
 config BR2_PACKAGE_QT5JSBACKEND