tests: Add .weston extension to clients tests

We can then add tests which do not use Weston in the test suite.

Signed-off-by: Quentin Glidic <sardemff7+git@sardemff7.net>
diff --git a/tests/.gitignore b/tests/.gitignore
index fac1f7b..ad11240 100644
--- a/tests/.gitignore
+++ b/tests/.gitignore
@@ -1,3 +1,4 @@
+*.weston
 logs
 matrix-test
 setbacklight
@@ -6,11 +7,5 @@
 wayland-test-client-protocol.h
 wayland-test-protocol.c
 wayland-test-server-protocol.h
-text-test
-keyboard-test
-event-test
-button-test
-xwayland-test
 subsurface-client-protocol.h
 subsurface-protocol.c
-subsurface-test