rewrite tests (#515)

* rewrite tests to work with meson

This ports our tests to meson and makes them able to be run in parallel.

* add tests to ci

* rewrite test/check-trailing-newlines in bash

This test was using a GNU sed command which does not work on Alpine Linux.

test/check-xfunc-usage.sh

@@ -0,0 +1,15 @@
+#!/bin/sh
+
+top_srcdir=${SOURCE_ROOT:-..}
+. ${top_srcdir}/test/setup_env.sh
+
+ebegin "Checking for x* func usage"
+out=$(cd ${top_srcdir}; find src -name '*.[ch]' \
+	! -name queue.h \
+	-exec grep -n -E '\<(malloc|strdup)[[:space:]]*\(' {} + \
+	| grep -v \
+		-e src/shared/helpers.h \
+		-e src/libeinfo/libeinfo.c)
+
+[ -z "${out}" ]
+eend $? "These need to be using the x* variant:"$'\n'"${out}"