.gitignore: Ignore nginx-*

After running t/build-and-run an nginx directory is left in the main
directory. Hide this from git status since we won't want to check it in.

Author: ryandesign

.gitignore

@@ -1,4 +1,5 @@
 *.sw[op]
+/nginx-*
 /t/*.sh
 /t/*.out
 /t/*.err