Update print/mupdf to mupdf-1.10

pkgsrc changes:
* Update DESCR and COMMENT to better reflect current status of MuPDF
* Delete security patches addressing CVE-2016-6265 and CVE-2016-6525,
  fixed upstream.
* Bump BUILDLINK_A[BP]I_DEPENDS.mupdf (no longer compatible with 1.9 API)

Changes:
List of changes in MuPDF 1.10

* Headline changes:
  * FictionBook (FB2) e-book support.
  * Simple SVG parser (a small subset of SVG only).
  * mutool convert: a new document conversion tool and interface.
  * Multi-threaded rendering in mudraw.
  * Luratech decoders for JBIG2 and JPEG2000 (commercial releases only).
  * Optional JPEG-XR support (not included by default for security reasons).
  * Updated base 14 fonts from URW.
  * New CJK font with language specific variants.
  * Hyperlink support in EPUB.

* Reduced memory use:
  * New tool muraster: example printer driver with limited RAM usage and automatic banding.
  * Alpha channel is now optional in pixmaps.
  * More aggressive purging of cached objects.
  * Partial image decoding for lower memory use when banding.

* Reduced code size when building with a subset of features:
  * Reduced default set of built-in CMap tables to the minimum required.
  * FZ_ENABLE_PDF, _XPS, _JS, to disable features at compile time.
  * Function level linking.

* Interface changes and cleanups:
  * Dropped pdf object generation numbers from public interfaces.
  * Simplified PDF page, xobject, and annotation internals.
  * Closing and freeing devices and writers are now separate steps.
  * Improved PDF annotation editing interface (still a work in progress).
  * Document writer interface.
  * Banded image writer interface.

* Mobile viewers:
  * New JNI interfaces to match capabilities of 'mutool run' javascript.
  * New android and desktop java examples using new JNI interface.

(leot)