[IBAL] Fix WPP trace previx for AL_PRINT

[IBAL] Fix WPP trace previx for AL_PRINT

The AL_PRINT WPP prefix adds a space before the colon.  This makes output look funny if you use AL_PRINT instead of AL_ENTER to create a more detailed entry message (with parameter values, for example), as the colon won't align.  This makes it hard to search a file for function entry.

Signed-off-by: Fab Tillier <ftillier@microsoft.com>
git-svn-id: svn://openib.tc.cornell.edu/gen1@1967 ad392aa1-c5ef-ae45-8dd8-e69d62a5ef86