spawn-fcgi: needs mmu

Fixes
http://autobuild.buildroot.net/results/cb6605b223642e647981e697f17d89bb97e223a6/

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

package/spawn-fcgi/Config.in

@@ -1,5 +1,6 @@
 config BR2_PACKAGE_SPAWN_FCGI
 	bool "spawn-fcgi"
+	depends on BR2_USE_MMU # fork()
 	help
 	  FastCGI process spawner.
 	  Project split from lighttpd.