Update .gitignore to reflect modules in subdirectories and gitiles.config

Change-Id: I3d98b78c718c8275343fe6178d1bf397ce6a5dd5

.gitignore

diff --git a/.gitignore b/.gitignore
index ebbbd5f..461cc3a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,8 @@
-/.classpath
-/.project
-/.settings
+.classpath
+.project
+.settings
+*/.classpath
+*/.project
+*/.settings
+*/target
+gitiles.config