annotate.perl triggers rpm bug

annotate.perl triggers rpm bug

RPM, at least on Fedora boxes, automatically creates a
dependency for any perl "use" lines, and one of the help text
lines unfortunately begins like this:

    -S, --rev-file revs-file
            use revs from revs-file instead of calling git-rev-list

RPM gets confused and creates a false dependecy for the
nonexistent perl package "revs".  Obviously this creates a
problem when someone goes to install the git-core rpm.

Since other help sentences all start with capital letter, make
this one match them by upcasing "Use".  As a side effect, RPM
stops getting confused.

Signed-off-by: Junio C Hamano <junkio@cox.net>