In the linux makefiles, prefix every bootstrap jdk command (i.e., java, javac, javah, etc.)
with '$(REMOTE)', where REMOTE is defined to be the remote execution method of the
builders choice. So, for example, we could issue the following 'make' command.
make REMOTE="rsh <linux-i586-machine-name>" product
where <linux-i586-machine-name> is the name of an x86 or x64 box running linux.
One still must set one of ALT_BOOTDIR, BOOTDIR or JAVA_HOME to point to the
full pathname of a bootstrap jdk that's executable on <linux-i586-machine-name>.