Roll Harfbuzz to 2.7.0 (e2327f4)

Author: dnfield

DEPS

@@ -125,7 +125,7 @@ deps = {
    Var('fuchsia_git') + '/third_party/rapidjson' + '@' + 'ef3564c5c8824989393b87df25355baf35ff544b',
 
   'src/third_party/harfbuzz':
-   Var('fuchsia_git') + '/third_party/harfbuzz' + '@' + 'f5c000538699a4e40649508a44f41d37035e6c35',
+   Var('fuchsia_git') + '/third_party/harfbuzz' + '@' + 'e2327f4db2f1643398d124c8c5a6d5da91e5e0fc',
 
   'src/third_party/libcxx':
    Var('fuchsia_git') + '/third_party/libcxx' + '@' + '7524ef50093a376f334a62a7e5cebf5d238d4c99',