7163395: jdk8/tl no longer builds on Mac

[Alan Bateman]

I need a reviewer for a trivial change to get jdk8/tl building on Mac 
again. Jim's changes for 7130404 [1] change the os.arch variable to 
"x86_64" to be compatible with Apple's JDK but the change-set doesn't 
add a jvm.cfg to the x86_64 directory. The issue is trivially fixed by 
moving the jvm,cfg to the right location:

$ hg diff -g
diff --git a/src/macosx/bin/amd64/jvm.cfg b/src/macosx/bin/x86_64/jvm.cfg
rename from src/macosx/bin/amd64/jvm.cfg
rename to src/macosx/bin/x86_64/jvm.cfg

Note that jdk7u doesn't have this issue as the corresponding change-set 
added a new jvm,cfg.

Thanks,
Alan.

[1] http://hg.openjdk.java.net/jdk8/tl/jdk/rev/77b35c5c4b95