ObjC fixup for the branch.

- Shouldn't need SRCROOT in the project since Xcode should be setting the working directory to where the project lives.
- Remove the packed/unpacked repeated enum field in the tests and update the code to handle the defaults.
- Move up the ignore to cover .DS_Store files in src also.

add starstar
diff --git a/.gitignore b/.gitignore
index a296142..8ea85af 100644
--- a/.gitignore
+++ b/.gitignore
@@ -92,7 +92,8 @@
 objectivec/ProtocolBuffers_iOS.xcodeproj/project.xcworkspace/xcuserdata/
 objectivec/ProtocolBuffers_iOS.xcodeproj/project.xcworkspace/xcshareddata/ProtocolBuffers_iOS.xccheckout
 objectivec/ProtocolBuffers_iOS.xcodeproj/xcuserdata/
-objectivec/**/.DS_Store
+# OS X's Finder creates these for state about opened windows/etc.
+**/.DS_Store
 
 # Comformance test output
 conformance/.libs/