RFR 4947890 : Minimize JNI upcalls in system property initialization

[Roger Riggs]

Updates to include the suggestions made by Mandy and Brent:

  - Move the build-time properties from native code to the 
VersionProps.java.template
    including java.vendor.* and java.specification.* properties, plus 
the java.class.version (major.minor)
    This included two changes to the build that generates source of 
VersionProps.java.

  - Updated the StaticProperty initialization to be explicitly invoked 
by initProperties.

  - Makes separate calls to native to retrieve the platform properties 
and VM/command line properties

  - (The hotspot function for JVM_GetProperties are unchanged)

Webrev:
http://cr.openjdk.java.net/~rriggs/webrev-props-only-raw/

Issue:
https://bugs.openjdk.java.net/browse/JDK-4947890

Thanks, Roger