Add the bitmap generator to the source distribution.

divVerent · divVerent · commit 0a7f3dc19901 · 2020-01-15T08:44:26.000-08:00
It documents where the xbm file comes from.
diff --git a/Makefile.am b/Makefile.am
@@ -240,6 +240,7 @@ EXTRA_DIST = \
 	doc/xsecurelock.1.md \
 	ensure-documented-settings.sh \
 	helpers/saver_blank \
+	incompatible_compositor.xbm.sh \
 	run-iwyu.sh \
 	run-linters.sh \
 	test/*.c \
