The require statement at the top of git-svnimport seems to confuse
rpmbuild dependency generation.  It uses the newer notation "v5.8.0",
and rpm ends up requiring "perl(v5.8.0)", while we would want it to
say something like "perl >= 0:5.008".

Ryan suggests old-style "require 5.008" might fix this problem, so
here it is.
Signed-off-by: NJunio C Hamano <junkio@cox.net>