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>.

Change-Id: I28848f5294d0575d8abb1759c202cc3c2db85ac2
Reviewed-on: http://gerrit.openafs.org/10540
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Derrick Brashear <shadow@your-file-system.com>