[boost] ./configure generates Makefile with spaces instead of tabs

The last few times I've checked out the latest from cvs and ran ./configure, the generated Makefile contains spaces instead of tabs for the commands to execute within the rules. This is because configure contains spaces rather than tabs in its file where it generates the Makefile. Gnu make complains about this. I didn't see anything in a quick search of the archives mentioning this, so just letting the list know incase this wasn't the intention. Brian