Review Request JDK-8182032: Make java.compiler upgradeable

[Mandy Chung]

Webrev at:
   http://cr.openjdk.java.net/~mchung/jdk9/webrevs/8182032/webrev.00/

java.compiler is a standalone technology that allows to be running on older JDK, in particular for IDE to support new language features.

This patch takes out the make logic to find the modules that directly and indirectly require any upgradeable modules and include them as upgradeable.  Instead it lists all upgradeable modules.  The list of upgradeable modules is small whereas the exclude list is not (which is also error-prone to find them).  I have added a new test to verify what modules are hashed in java.base.

Mandy