Bug 1397229 - Disable toolkit/browser/components/tooltiptext/browser_input_file_tooltips.js on Win10, r=jmaher

This started failing when migrating from Windows 8 -> Windows 10. Fix is
tracked in bug 1400368.

MozReview-Commit-ID: BIKAQDcJnXR

--HG--
extra : rebase_source : 5d99fbd6d548344781c79d8debe918e713b533ee

toolkit/components/tooltiptext/tests/browser.ini

@@ -5,3 +5,4 @@ support-files = xul_tooltiptext.xhtml
 [browser_bug561623.js]
 [browser_bug581947.js]
 [browser_input_file_tooltips.js]
+skip-if = os == 'win' && os_version == '10.0'  # Permafail on Win 10 (bug 1400368)