Bug 110293 uses read -d which is a non-portable bashism
https://bugs.webkit.org/show_bug.cgi?id=113349

Reviewed by Gustavo Noronha Silva.

* Source/autotools/SetupWebKitFeatures.m4: Pass the default feature set to the
feature script in a more portable way.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@147967 268f45cc-cd09-0410-ab3c-d52691b4dbfc