RFR: 8014003: New build does not handle symlinks in workspace path

[Erik Joelsson]

Due to a difference in the default output of the pwd command on mac vs 
linux and solaris, configure wouldn't allow the source root to be a 
symlink on mac. This patch fixes this by adding -L to the pwd command, 
forcing it to show the logical directory rather than the symlink free one.

http://cr.openjdk.java.net/~erikj/8014003/webrev.root.01/
/Erik