jruby test test instructions fail on ppc64 system.

[ralphbellofatto]

When we run get the jruby git source and compile and attempt to test as per the BUILDME.md instructions, it fails with the following message:

[INFO] --- gem-maven-plugin:1.0.7:initialize (default) @ jruby-tests ---
[INFO] Unrecognized option: -client
[INFO] Error: Could not create the Java Virtual Machine.
[INFO] Error: A fatal exception has occurred. Program will exit.
[INFO] ------------------------------------------------------------------------
[INFO] Reactor Summary:
[INFO]
[INFO] JRuby ............................................. SUCCESS [0.813s]
[INFO] JRuby Core ........................................ SUCCESS [16.940s]
[INFO] JRuby Truffle ..................................... SUCCESS [2.356s]
[INFO] JRuby Lib Setup ................................... SUCCESS [9.444s]
[INFO] JRuby Integration Tests ........................... FAILURE [0.464s]
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 30.485s
[INFO] Finished at: Thu Mar 19 12:31:40 EDT 2015
[INFO] Final Memory: 39M/394M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal de.saumya.mojo:gem-maven-plugin:1.0.7:initialize (default) on project jruby-t sts: Execution default of goal de.saumya.mojo:gem-maven-plugin:1.0.7:initialize failed: Java returned: 1 ->  

we did the following to attempt this compile:

 1152  git clone https://github.com/jruby/jruby.git
mvn compile
mvn -Pbootstrap
mvn -Pbootstrap-no-launcher

The second profile was in the instructions should the first instruction fail.