Removes the spellchecker dictionaries from the source tarball.

The spellchecker dictionaries, which are used only for unit tests, consumes lots of space in the source tarball. To reduce the sizeo of a source tarball, this change removes them from the source tarball.

BUG=none
TEST=See the source tarball does not include "src/third_party/hunspell_dictionaries/*".
Review URL: http://codereview.chromium.org/2724001

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@49368 0039d316-1c4b-4281-b951-d872f2087c98

tools/export_tarball/export_tarball.py

@@ -32,6 +32,7 @@ NONESSENTIAL_DIRS = (
     'src/chrome/test/data',
     'o3d/documentation',
     'o3d/samples',
+    'third_party/hunspell_dictionaries',
     'third_party/lighttpd',
     'third_party/vc_80',
     'third_party/WebKit/LayoutTests',