procps-ng: Depends on MMU

This package needs MMU. Hence added dependency on BR2_USE_MMU

Fixes:
http://autobuild.buildroot.net/results/f24/f24aa16857e91fb6b03f9ac7ab0442fedcab8546//

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

package/procps-ng/Config.in

@@ -1,5 +1,6 @@
 config BR2_PACKAGE_PROCPS_NG
 	bool "procps-ng"
+	depends on BR2_USE_MMU # fork()
 	select BR2_PACKAGE_NCURSES
 	select BR2_PACKAGE_GETTEXT if BR2_NEEDS_GETTEXT_IF_LOCALE
 	help