Remove extra whitespace from macro invocations

On MacOS X 10.9, the compiler has switched to LLVM and as a consequence
generates an error if there is a space between a macro invocation and
the starting left parenthesis.

Based on code originally done by Matt Haught <dmhaught@ncsu.edu>.

Reviewed-on: http://gerrit.openafs.org/10540
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Derrick Brashear <shadow@your-file-system.com>
(cherry picked from commit ce96143d79ea006f7b1318dd1c962d4c4f79fc1e)

Change-Id: I0e1c2a27ea2dc85205e9fa267a804438aad77bfe
Reviewed-on: http://gerrit.openafs.org/10543
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Benjamin Kaduk <kaduk@mit.edu>
Reviewed-by: Andrew Deason <adeason@sinenomine.net>
Reviewed-by: Marc Dionne <marc.c.dionne@gmail.com>
Reviewed-by: Stephan Wiesand <stephan.wiesand@desy.de>