autotools: include meson build files in tarball

This adds the meson.build, meson_options.txt, and a few scripts that are
used exclusively by the meson build.

v2: - Remove accidentally included changes needed to test make dist with
      LLVM > 3.9

Signed-off-by: Dylan Baker <dylan.c.baker@intel.com>
Acked-by: Eric Engestrom <eric@engestrom.ch>
Reviewed-by: Emil Velikov <emil.velikov@collabora.com>

src/util/Makefile.am

@@ -83,7 +83,8 @@ EXTRA_DIST = \
 	merge_driinfo.py \
 	SConscript \
 	xmlpool.h \
-	sha1/README
+	sha1/README \
+	meson.build
 
 PYTHON_GEN = $(AM_V_GEN)$(PYTHON2) $(PYTHON_FLAGS)
 

src/util/tests/hash_table/Makefile.am

@@ -43,3 +43,5 @@ TESTS = \
 	$()
 
 check_PROGRAMS = $(TESTS)
+
+EXTRA_DIST = meson.build

src/util/tests/string_buffer/Makefile.am

@@ -38,3 +38,5 @@ string_buffer_test_LDADD = \
 	$(top_builddir)/src/util/libmesautil.la \
 	$(PTHREAD_LIBS) \
 	$(DLOPEN_LIBS)
+
+EXTRA_DIST = meson.build

src/util/xmlpool/Makefile.am

@@ -58,7 +58,8 @@ EXTRA_DIST = \
 	t_options.h \
 	$(POS) \
 	$(MOS) \
-	SConscript
+	SConscript \
+	meson.build
 
 BUILT_SOURCES = options.h
 CLEANFILES = \