bash: mark as essential. Bump revision.

--HG--
extra : convert_revision : b8ec94e93305924d1036e10fd507b1dbfd562e61

templates/bash/template

@@ -1,7 +1,7 @@
 # Template build file for 'bash'.
 pkgname=bash
 version=4.0
-revision=1
+revision=2
 distfiles="http://ftp.gnu.org/gnu/bash/bash-$version.tar.gz"
 build_style=gnu_configure
 configure_args="--without-bash-malloc --with-curses --bindir=/bin
@@ -28,6 +28,7 @@ long_desc="
  to sixty-four. In addition, most sh scripts can be run by Bash without
  modification."
 
+essential=yes
 base_chroot=yes
 register_shell="/bin/bash"