Sort the i18n extension sources correctly.

It's important that e.g. the header comes first, and the footer last

BUG=v8:2745
R=jkummerow@chromium.org

Review URL: https://codereview.chromium.org/18187005

Patch from Jochen Eisinger <jochen@chromium.org>.

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@15476 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

tools/gyp/v8.gyp

@@ -873,16 +873,16 @@
           '../../src/generator.js'
         ],
         'i18n_library_files': [
-          '../../src/extensions/i18n/break-iterator.js',
-          '../../src/extensions/i18n/collator.js',
-          '../../src/extensions/i18n/date-format.js',
-          '../../src/extensions/i18n/footer.js',
-          '../../src/extensions/i18n/globals.js',
           '../../src/extensions/i18n/header.js',
-          '../../src/extensions/i18n/i18n-utils.js',
+          '../../src/extensions/i18n/globals.js',
           '../../src/extensions/i18n/locale.js',
+          '../../src/extensions/i18n/collator.js',
           '../../src/extensions/i18n/number-format.js',
+          '../../src/extensions/i18n/date-format.js',
+          '../../src/extensions/i18n/break-iterator.js',
+          '../../src/extensions/i18n/i18n-utils.js',
           '../../src/extensions/i18n/overrides.js',
+          '../../src/extensions/i18n/footer.js',
         ],
       },
       'actions': [