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

[Erik Joelsson]

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/

/Erik