This change changes how the version string will look in Oracle CI
builds. A string that current looks like this:
13-internal+0-jdk13-jdk.844
Will instead look like this:
13-ea+0-844
For projects, the $PRE string will be used to identify the project, like
this:
13-panama+0-844
While in the area, I also moved the setting of "ea" or not in the $PRE
string to a property in the version-numbers file.
Note that these changes only affect builds produced by Oracle.
Bug: https://bugs.openjdk.java.net/browse/JDK-8223464
Webrev: http://cr.openjdk.java.net/~erikj/8223464/webrev.01/
/Erik
