libtracker-data: Don't fail to build with "all" target override
libtracker-data: Don't fail to build with "all" target override

The "all" target was used because the MAN page generation was not working
previously, but it seems it does. So this line has been removed!

https://bugzilla.gnome.org/show_bug.cgi?id=739260

outofbits/tracker,outofbits/tracker,outofbits/tracker,outofbits/tracker,outofbits/tracker,outofbits/tracker,outofbits/tracker