OSHMEM: fix check-help-string.pl errors and warnings.

This commit was SVN r32511.
(cherry picked from commit e974bec57e7f9ff7fd9705291f6d11a2ecc69308)
Merge pull request #24 from alinask/topic_oshmem_help_string

OSHMEM: fix check-help-string.pl errors and warnings.