PKG: gitattributes: include more files
PKG: gitattributes: include more files

for building and installing
fixes certtools/intelmq#761

Signed-off-by: Sebastian Wagner <1b00c120e1c33c7e19a7cb69011b74f705830cf8@sebix.at>

certtools/intelmq,certtools/intelmq,aaronkaplan/intelmq,aaronkaplan/intelmq,aaronkaplan/intelmq,certtools/intelmq