Adding explanation to Android Studio channel names.

Change-Id: Icc994f81a04b3d13a390030cfcf77cf1292193a3
diff --git a/.gitignore b/.gitignore
index 4b9f8a8..f6423a0 100644
--- a/.gitignore
+++ b/.gitignore
@@ -6,3 +6,5 @@
 /test-system
 /test-config
 .jps-build-data
+/bin/build-log.xml
+/bin/build.log