Certain strings are misinterpreted as comments by perlmod.mk and removed
when they shouldn't be (in particular, perl-cgi). Enable this whenever
you have sufficient flash space.
Globally, CONFIG_PERL_NOCOMMENT=y (default) causes comments to be stripped
as before. However, a package (like perl-cgi) can override this with
PKG_LEAVE_COMMENTS=1.
Signed-off-by: Philip Prindeville <philipp@redfish-solutions.com>