build: Add missing file to distribution

Required to build using Meson.
Also add a check to "distcheck" job to test you can build with
Meson from distribution file.

Signed-off-by: Frediano Ziglio <freddy77@gmail.com>

.gitlab-ci.yml

@@ -88,8 +88,17 @@ syntax-check:
 
 distcheck:
   script:
+  - git clean -fdx
+  - git submodule foreach --recursive git clean -fdx
   - ./autogen.sh --enable-manual --enable-werror
   - make distcheck
+  - bz2=$( echo spice-*.bz2 )
+  - dir=${bz2%.tar.bz2}
+  - rm -rf "$dir"
+  - tar jxvf "$bz2"
+  - cd "$dir"
+  - meson --buildtype=release build
+  - ninja -C build
 
 # Same as makecheck job but use a Centos image
 makecheck-centos:

Makefile.am

@@ -21,6 +21,7 @@ EXTRA_DIST =					\
 	meson.build				\
 	meson_options.txt			\
 	build-aux/git-version-gen		\
+	build-aux/meson-dist			\
 	build-aux/meson/check-spice-common	\
 	CHANGELOG.md				\
 	doxygen.sh				\