fbterm: uses fork(), needs mmu

Fixes:
http://autobuild.buildroot.org/results/7d7/7d7081e7ce6e2be71b8df3b6213142c5ceeeccce/
http://autobuild.buildroot.org/results/54c/54cc2f443eddc1459b2006683f001d473ba65924/

And at the same time, cleanup the 'depends on' lines.

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/fbterm/Config.in

@@ -1,6 +1,9 @@
 config BR2_PACKAGE_FBTERM
 	bool "fbterm"
-	depends on (BR2_INSTALL_LIBSTDCPP && BR2_ENABLE_LOCALE && BR2_USE_WCHAR)
+	depends on BR2_INSTALL_LIBSTDCPP
+	depends on BR2_ENABLE_LOCALE
+	depends on BR2_USE_WCHAR
+	depends on BR2_USE_MMU # fork()
 	select BR2_PACKAGE_FONTCONFIG
 	select BR2_PACKAGE_LIBERATION
 	help
@@ -10,4 +13,5 @@ config BR2_PACKAGE_FBTERM
 	  http://code.google.com/p/fbterm/
 
 comment "fbterm needs a toolchain w/ C++, wchar, locale"
+	depends on BR2_USE_MMU
 	depends on !(BR2_INSTALL_LIBSTDCPP && BR2_ENABLE_LOCALE && BR2_USE_WCHAR)