solaris: help fs_conv_sol26 build cleanly

solaris: help fs_conv_sol26 build cleanly

handleit(), being static, should be declared before usage.

Change-Id: I5cf9767ed2fc552f7a22c7570d0a4d256a4111b1
Reviewed-on: http://gerrit.openafs.org/11134
Reviewed-by: Benjamin Kaduk <kaduk@mit.edu>
Reviewed-by: Michael Meffie <mmeffie@sinenomine.net>
Reviewed-by: Perry Ruiter <pruiter@sinenomine.net>
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: D Brashear <shadow@your-file-system.com>