Rename "alterl" to "erl".


git-svn-id: https://svn.apache.org/repos/asf/incubator/thrift/trunk@666481 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/.gitignore b/.gitignore
index ae513f4..6b5f0e2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -21,7 +21,7 @@
 install-sh
 lib/Makefile
 lib/Makefile.in
-lib/alterl/ebin
+lib/erl/ebin
 lib/cpp/.deps
 lib/cpp/.libs
 lib/cpp/Makefile