RFR: JDK-8027298: broken link in jdk8b113 macosx binaries

[Erik Joelsson]

Please review this simple fix for FDS on macosx. The actual debuginfo 
suffix on mac is dylib.dSYM, compared to other platforms where the .so 
is replaced with .debuginfo. This wasn't properly handled when 
generating the (somewhat weird) libjsig.diz symlink file.

Bug: https://bugs.openjdk.java.net/browse/JDK-8027298
Webrev: http://cr.openjdk.java.net/~erikj/8027298/webrev.jdk.01/

/Erik