Add generated arg/*/*.txt files to .gitignore.

Add generated arg//.txt files to .gitignore.
11ad7076 · Andrey Mokhov · 440aeff3 · 11ad7076
Commit 11ad7076 authored Jan 15, 2015 by Andrey Mokhov
--- a/.gitignore
+++ b/.gitignore
@@ -3,4 +3,4 @@
 _shake/
 _build/
 cfg/default.config
-arg/*.txt
+arg/*/*.txt