mail-client/thunderbird: stabilize 52.1.1 for amd64

Maintainer stabilized; it's as ready as it will ever be.  Also, upgrading addresses
the thunderbird->enigmail-delete bug 616430.

Package-Manager: Portage-2.3.3, Repoman-2.3.1

mail-client/thunderbird/thunderbird-52.1.1.ebuild

@@ -35,7 +35,7 @@ inherit flag-o-matic toolchain-funcs mozconfig-v6.52 makeedit autotools pax-util
 DESCRIPTION="Thunderbird Mail Client"
 HOMEPAGE="http://www.mozilla.com/en-US/thunderbird/"
 
-KEYWORDS="~alpha ~amd64 ~arm ~ppc ~ppc64 ~x86 ~x86-fbsd ~amd64-linux ~x86-linux"
+KEYWORDS="~alpha amd64 ~arm ~ppc ~ppc64 ~x86 ~x86-fbsd ~amd64-linux ~x86-linux"
 SLOT="0"
 LICENSE="MPL-2.0 GPL-2 LGPL-2.1"
 IUSE="bindist crypt hardened ldap lightning +minimal mozdom rust selinux"