Revert "[molecules/*.common] drop xterm, adding it just in minimal"

This reverts commit fd834bf692.

molecules/enlightenment.common

@@ -74,6 +74,7 @@ packages_to_add:
         x11-misc/lightdm-gtk-greeter,
 	x11-misc/magneto-gtk,
 	x11-terms/terminology,
+	x11-terms/xterm,
 	x11-themes/equinox-themes,
 	x11-themes/gtk-engines-xfce,
 	x11-themes/tango-icon-theme,

molecules/graphic-environment.common

@@ -20,5 +20,6 @@ packages_to_add:
 	x11-themes/gtk-engines:2,
 	x11-themes/hicolor-icon-theme,
 	x11-themes/iottinka-artwork,
+	x11-terms/xterm,
 	x11-libs/libXxf86misc,
 	x11-misc/primus,

molecules/minimal.common

@@ -48,7 +48,6 @@ packages_to_add:
 	app-text/pastebunz,
 	lxde-base/lxdm,
 	media-gfx/feh,
-	x11-terms/xterm,
 	net-dialup/ppp,
 	net-dialup/rp-pppoe,
 	net-irc/irssi,

molecules/xfce.common

@@ -107,6 +107,7 @@ packages_to_add:
 	x11-misc/lightdm-gtk-greeter,
 	x11-misc/xvkbd,
 	x11-terms/xfce4-terminal,
+	x11-terms/xterm,
 	x11-themes/gnome-themes-standard,
 	x11-themes/iottinka-artwork,
 	x11-themes/sabayon-artwork-core,