Log Message:
Update print/mupdf to mupdf-1.10a

pkgsrc changes:
 - Include more bl3 in buildlink3.mk to reflect current reality
 - Bump BUILDLINK_A[BP]I_DEPENDS.mupdf to 1.10a (packages that depends on
   mupdf seems to not run without being rebuilded despite a bug fix release)

Changes:
MuPDF 1.10a (2016-11-28)
------------------------
Version 1.10a is a bug fix release.

If you downloaded the windows release for 1.10 you should also
upgrade, since the zip archive accidentally included the RC2 binaries
instead of the final version.

A bug with mutool and saving PDF files using the 'ascii' option
has been fixed.

The iOS build issues have been fixed.