sys-devel/llvm-common: Add 13.x live ebuild

Signed-off-by: Michał Górny <mgorny@gentoo.org>

sys-devel/llvm-common/llvm-common-13.0.0.9999.ebuild

@@ -0,0 +1,27 @@
+# Copyright 1999-2021 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=7
+
+inherit llvm.org
+
+DESCRIPTION="Common files shared between multiple slots of LLVM"
+HOMEPAGE="https://llvm.org/"
+
+LICENSE="Apache-2.0-with-LLVM-exceptions UoI-NCSA"
+SLOT="0"
+KEYWORDS=""
+IUSE=""
+
+RDEPEND="!sys-devel/llvm:0"
+
+LLVM_COMPONENTS=( llvm/utils/vim )
+llvm.org_set_globals
+
+src_install() {
+	insinto /usr/share/vim/vimfiles
+	doins -r */
+	# some users may find it useful
+	newdoc README README.vim
+	dodoc vimrc
+}