elixir: update to 1.12.3.

srcpkgs/elixir/template

@@ -1,6 +1,6 @@
 # Template file for 'elixir'
 pkgname=elixir
-version=1.12.2
+version=1.12.3
 revision=1
 build_style=gnu-makefile
 make_check_target="test"
@@ -13,4 +13,10 @@ license="Apache-2.0"
 homepage="http://elixir-lang.org/"
 changelog="https://raw.githubusercontent.com/elixir-lang/elixir/v${version%.*}/CHANGELOG.md"
 distfiles="https://github.com/elixir-lang/elixir/archive/v${version}.tar.gz"
-checksum=701006d1279225fc42f15c8d3f39906db127ddcc95373d34d8d160993356b15c
+checksum=c5affa97defafa1fd89c81656464d61da8f76ccfec2ea80c8a528decd5cb04ad
+
+do_check() {
+	ERL_EPMD_PORT=5369 make ${make_check_target}
+	# The elixir test suite starts up epmd and then doesn't kill it again afterwards.
+	epmd -port 5369 -kill
+}