xapp_xdpyinfo: depends on MMU

This package needs MMU. Hence added dependency on BR2_USE_MMU

Fixes http://autobuild.buildroot.net/results/2da/2dada0264409d8fa6befedbc02c0de77c605a5fa/

Signed-off-by: Yuvaraj Patil <yuvaraj.patil@wipro.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/x11r7/xapp_xdpyinfo/Config.in

@@ -1,5 +1,6 @@
 config BR2_PACKAGE_XAPP_XDPYINFO
 	bool "xdpyinfo"
+	depends on BR2_USE_MMU # fork()
 	select BR2_PACKAGE_XLIB_LIBX11
 	select BR2_PACKAGE_XLIB_LIBXEXT
 	select BR2_PACKAGE_XLIB_LIBXTST