qte.mk: Use depends on for toolchain features

Buildroot is adopting depends on for toolchain features and
select for packages. Make this change in this file.
 
Signed-off-by: Daniel Laird <daniel.j.laird@nxp.com>

package/qte/Config.in

@@ -2,7 +2,7 @@ config BR2_PACKAGE_QTE
 	bool "Qt/E"
 	depends on BR2_DEPRECATED
 	depends on BR2_INSTALL_LIBSTDCPP
-	select BR2_PTHREADS_NATIVE
+	depends on BR2_PTHREADS_NATIVE
 	select BR2_PACKAGE_JPEG
 	select BR2_PACKAGE_LIBPNG
 	help