[ews] Improve error message when patch fails to apply to trunk. Current error message is 'Patch does not apply', this might be confusing for few people (especially new contributors). Better wording would be: 'Tools/Scripts/svn-apply failed to apply patch 123456 to trunk'.
Created attachment 395374 [details] Patch
Sample run: https://ews-build.webkit-uat.org/#/builders/34/builds/137 Sample bug comment: https://bugs.webkit.org/show_bug.cgi?id=179531#c35
Committed r259464: <https://trac.webkit.org/changeset/259464> All reviewed patches have been landed. Closing bug and clearing flags on attachment 395374 [details].
<rdar://problem/61262348>