Merge pull request dart-lang/glob#20 from bcko/patch-1

Update .gitignore to new `dart_tool` pub cache

pkgs/glob/.gitignore

diff --git a/pkgs/glob/.gitignore b/pkgs/glob/.gitignore
index 7dbf035..ab3cb76 100644
--- a/pkgs/glob/.gitignore
+++ b/pkgs/glob/.gitignore
@@ -1,5 +1,6 @@
 # Don’t commit the following directories created by pub.
 .buildlog
+.dart_tool/
 .pub/
 build/
 packages
@@ -12,4 +13,4 @@
 *.js.map
 
 # Include when developing application packages.
-pubspec.lock
\ No newline at end of file
+pubspec.lock