REGRESSION (r197358): WebKitSystemInterface.h copied into directory named "--llvm"

REGRESSION (r197358): WebKitSystemInterface.h copied into directory named "--llvm"
https://bugs.webkit.org/show_bug.cgi?id=155838

Reviewed by Alexey Proskuryakov.

Do not pass command line flag --llvm when calling script copy-webkitlibraries-to-product-directory
to avoid copying the WebKitSystemInterface libraries to an incorrect location. The --llvm flag was
removed from copy-webkitlibraries-to-product-directory in <http://trac.webkit.org/changeset/197358>.

* WebKit.xcworkspace/xcshareddata/xcschemes/All Source.xcscheme:

git-svn-id: https://svn.webkit.org/repository/webkit/trunk@198681 268f45cc-cd09-0410-ab3c-d52691b4dbfc