uniform blending: don't use certain parameters defined by drawn/parametric masks

this should fix #9703
blending: another fix for "hidden" parameters
remove rpath

Signed-off-by: Togan Muftuoglu <toganm@users.sourceforge.net>
cmstest: Call g_type_init where needed
cmstest: Show size of X atom blob
Preface Exiv2 messages with "[exiv2] "
cmstest: was core darktable built with colord?
cmstest: Tell colord to compute MD5 hashes

For legacy profiles loaded through colord the header hash might be
missing so if we ever want to compare those we have to make sure that
they are there.
Merge branch 'blendif'

This contains fixes for #9703