FIXME for license file checksum is present even if all license checksums are resolved

[pbrkr]

Looking at the same output as #17, the FIXME message for incomplete license file checksums is present in the recipe even if all checksums have been successfully resolved:

# FIXME: update generateme with the real MD5 of the license file
LIC_FILES_CHKSUM = " \
    file://hello/LICENSE;md5=86d3f3a95c324c9479bd8986968f4327 \
"

This is liable to confuse anyone searching for FIXME tags in a repository.

I see that this line is present in the template text. Perhaps instead there should be a placeholder like {lic_files_fixme} which can be set to an empty string if all checksums are resolved, or to the fixme warning if some checksums were not resolved.