7u60 request for approval for JDK-8029304: JFR broken in 7u train for JDK Linux for ARM or OpenJDK

[Erik Joelsson]

Hello,

This is a 7u60 request for aproval for the issue:
https://bugs.openjdk.java.net/browse/JDK-8029304
Webrev here:
http://cr.openjdk.java.net/~erikj/8029304/webrev.jdk.01/

reviewed by: collins, dholmes

This change stops jfr.jar from being built on arm, where jfr is 
currently not supported. It also moves the logic for determining if jfr 
shold be built to a closed makefile.

/Erik