Supporting --version in dejagnu(1) multi-launcher

Is it reasonable to assume that the launcher and installed commands will 
always be from the same version of DejaGnu?

If so, I can have the launcher locate runtest.exp and grep it for "^set 
frame_version" instead of adding another copy of the DejaGnu version.  
(The commands will be installed parallel to runtest.exp in a "commands" 
directory.)  Handling --version in the launcher avoids each command 
needing to support it.

The existing code seems to make this assumption -- the runtest shell 
script carries no version information and simply passes --version on to 
runtest.exp.


-- Jacob