Create the vapi/ directory in autovapi.sh if needed

diff --git a/autovapi.sh b/autovapi.sh
index 05c8686..a108666 100755 (executable)
--- a/autovapi.sh
+++ b/autovapi.sh
@@ -2,6 +2,7 @@
 #
 # Generate config.vapi from config.h
 #
+mkdir -p vapi/
 (
 echo '// config.vapi.  Generated from config.h by autovapi.sh.'
 echo '[CCode (cheader_filename = "config.h")]'