test: Install GNOME-style installed-tests metadata

This allows these tests to be discovered and run by
gnome-desktop-test-runner.

Signed-off-by: Simon McVittie <smcv@collabora.com>

test/Makefile.in

@@ -88,13 +88,24 @@ TARGETS = \
 @OPENGLES2_TARGETS@ += testgles2$(EXE)
 
 
-all: Makefile $(TARGETS) copydatafiles
+all: Makefile $(TARGETS) copydatafiles generatetestmeta
 
 installedtestsdir = $(libexecdir)/installed-tests/SDL2
+installedtestsmetadir = $(datadir)/installed-tests/SDL2
+
+generatetestmeta:
+	rm -f *.test
+	set -e; for exe in $(noninteractive) $(needs_audio) $(needs_display); do \
+		sed \
+			-e 's#@installedtestsdir@#$(installedtestsdir)#g' \
+			-e "s#@exe@#$$exe#g" \
+			< $(srcdir)/template.test.in > $$exe.test; \
+	done
 
 install: all
 	install -D -t $(DESTDIR)$(installedtestsdir) $(TARGETS)
 	install -m644 -D -t $(DESTDIR)$(installedtestsdir) $(DATA)
+	install -m644 -D -t $(DESTDIR)$(installedtestsmetadir) *.test
 
 Makefile: $(srcdir)/Makefile.in
 	$(SHELL) config.status $@
@@ -362,7 +373,7 @@ testmouse$(EXE): $(srcdir)/testmouse.c
 
 
 clean:
-	rm -f $(TARGETS)
+	rm -f $(TARGETS) *.test
 
 distclean: clean
 	rm -f Makefile