[darwinbuild] darwinbuild doesn't like extra spaces in options

[Shantonu Sen]

bad things happen if you improperly pass arguments....

I think I was confused because darwinxref takes "-b foo" but  
darwinbuild uses "-build=foo"

# /usr/local/bin/darwinbuild -build 8A428 system_cmds
*** Fetching Sources ...
*** Installing Roots ...
*** Installing Headers ...
*** Copying Sources ...
tar (child): /BuildRoot/Sources/8A428-system_cmds.tar.gz: Cannot  
open: No such file or directory
tar (child): Error is not recoverable: exiting now
tar: Child returned status 2
tar: Error exit delayed from previous errors
*** Mounting special filesystems ...
Mounting devfs ...
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 
++++++++++
BUILDING 8A428-system_cmds~1 on Sat Jul  9 22:55:26 PDT 2005
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 
++++++++++
Build configuration:
     Build host:      shantonu-sens-powerbook-g4-12.local
     Build tool:      make
     Build action:    install
     Build number:    -build
...