Add comments explaining flags

diff --git a/validate b/validate
index b1491c2..d4969ef 100644 (file)
--- a/validate
+++ b/validate
@@ -1,5 +1,11 @@
 #!/bin/sh
 
+# Flags:
+#   --no-clean:      don't make clean first, just carry on from
+#                    a previous interrupted validation run
+#   --testuite-only: don't build the compiler, just run
+#                    the test suite
+
 set -e
 
 no_clean=0