gnome-extra/nm-applet: Recover keywords that were dropped at some point

and never readded even if dep tree if now clean for them due to missing deps
being keyworded finally

Package-Manager: Portage-2.3.38, Repoman-2.3.9

gnome-extra/nm-applet/nm-applet-1.8.10-r1.ebuild

@@ -13,7 +13,7 @@ HOMEPAGE="https://wiki.gnome.org/Projects/NetworkManager"
 LICENSE="GPL-2+"
 SLOT="0"
 IUSE="+introspection +gcr +modemmanager selinux teamd"
-KEYWORDS="~alpha amd64 ~arm ~arm64 ~ia64 ~ppc ~ppc64 ~x86"
+KEYWORDS="~alpha amd64 ~arm ~arm64 ~ia64 ~ppc ~ppc64 ~sparc ~x86"
 
 RDEPEND="
 	>=app-crypt/libsecret-0.18