RFR: 8241996: on linux set full relro in the linker flags

[Baesken, Matthias]

Hi Erik, that's a good point .
New webrev :

http://cr.openjdk.java.net/~mbaesken/webrevs/8241996.1/


Best regards, Matthias


> Hello Matthias,
>
> We are currently setting -z now for slowdebug builds. That should be 
> removed if it's now set by default for all configs.