RFR: JDK-8029797: Let jprt run configure when building

[Tim Bell]

Hi Erik:

> Please review this change for jdk9.
>
> Until now, JPRT has used a rather hacky workaround when building using 
> the new makefiles (build-infra). A special maketarget "bridgebuild" 
> has been used to run configure and translate a select set of env 
> variables to configure arguments. This limits the ability to change 
> the configuration of jprt builds from the jprt command line. It also 
> increases the difference between how a local build and a jprt build is 
> done.
>
> JPRT was recently enhanced to support running configure and handling 
> configure arguments for the build. Activating this feature requires 
> some minor changes to the makefiles and jprt.properties. For jdk9, I 
> chose to fully remove the bridgebuild support along with it.
>
> BUG: https://bugs.openjdk.java.net/browse/JDK-8029797
> Webrev: http://cr.openjdk.java.net/~erikj/8029797/webrev.root.01/

Looks good-

/Tim