Bug 1325522 - Disable hkdf.worker.html test in Windows coverage builds because it times out very frequently. r=jgraham

--HG--
extra : rebase_source : 4bbdb5181158c9cd5d28b874cbaa349bbf21dd79

testing/web-platform/meta/WebCryptoAPI/derive_bits_keys/hkdf.worker.js.ini

@@ -4867,6 +4867,7 @@
   type: testharness
   disabled:
     if debug and (os == "linux") and (bits == 32): https://bugzilla.mozilla.org/show_bug.cgi?id=1318755
+    if ccov and (os == "win"): https://bugzilla.mozilla.org/show_bug.cgi?id=1325522
   expected:
     if debug and e10s and (os == "linux") and (version == "Ubuntu 12.04") and (processor == "x86") and (bits == 32): TIMEOUT
     if debug and not e10s and (os == "linux") and (version == "Ubuntu 12.04") and (processor == "x86") and (bits == 32): TIMEOUT