Tweak default ignore-assets path

Add .DS_Store to the list of ignored files that are silently
ignored (other dot-files are ignored but aapt emits a "(skipping <x>)"
message.)

Also, add a "!" prefix to the *~ pattern for Emacs/Vim/Gedit backup
files.

Finally, move the !*.scc pattern up in front of the .* pattern, such
that it doesn't match the earlier .* pattern (which is verbose, unlike
!*.scc).

Change-Id: Id3e96490f1802486aea8c58366d43e9d413971b8

tools/aapt/AaptAssets.cpp

@@ -58,7 +58,7 @@ static bool validateFileName(const char* fileName)
 
 // The default to use if no other ignore pattern is defined.
 const char * const gDefaultIgnoreAssets =
-    "!.svn:!.git:.*:<dir>_*:!CVS:!thumbs.db:!picasa.ini:!*.scc:*~";
+    "!.svn:!.git:!.ds_store:!*.scc:.*:<dir>_*:!CVS:!thumbs.db:!picasa.ini:!*~";
 // The ignore pattern that can be passed via --ignore-assets in Main.cpp
 const char * gUserIgnoreAssets = NULL;