Make OS X build script more usable for testing.

git-svn-id: https://valelab.ucsf.edu/svn/micromanager2/trunk@13776 d0ab736e-dc22-4aeb-8dc9-08def0aa14fd
OS X build script: Better printing of configure command line.

git-svn-id: https://valelab.ucsf.edu/svn/micromanager2/trunk@13777 d0ab736e-dc22-4aeb-8dc9-08def0aa14fd