RFR: JDK-8145185: Rename JAB the build tool to JIB

[Erik Joelsson]

Hello,

Since the acronym JAB was already taken by Java Access Bridge, we nee 
dto find a new name for the new build tool. The new name will be JIB - 
The JDK Integrated Build tool. All references and file names associated 
with JAB in the JDK 9 repos need to be changed to JIB.

Bug: https://bugs.openjdk.java.net/browse/JDK-8145185
Webrev: http://cr.openjdk.java.net/~erikj/8145185/webrev.01/

/Erik