app-misc/{buku,googler,nnn}: add bash auto-completion scripts

app-misc/buku/buku-9999.ebuild

@@ -6,7 +6,7 @@ EAPI=6
 PYTHON_COMPAT=( python{3_3,3_4,3_5,3_6} )
 PYTHON_REQ_USE="ncurses"
 
-inherit autotools git-r3
+inherit autotools git-r3 bash-completion-r1
 
 DESCRIPTION="Powerful command-line bookmark manager. Your mini-web!"
 HOMEPAGE="https://github.com/jarun/buku"
@@ -29,3 +29,8 @@ src_prepare() {
 	export PREFIX="/usr"
 	default
 }
+
+src_install() {
+	default
+	newbashcomp auto-completion/bash/${PN}-completion.bash ${PN}
+}