Log Message:
leptonica: updated to 1.80.0

1.80.0:
* Improve bmp handling of 1 bpp images and sanity checking of params.
* Add function to display all rgb gamut colors
* in Makefile.am, use option serial-tests to avoid races in testing
* Make md subdirectory and add ax_split_version.md there
* Simple function for hue-invariant mapping (pixMapWithInvariantHue)
* Fixed bug in limit of ptra size when used for sorting by bins.
* Use hashmap to count pixel colors in RGB(A) images.
* Convert hashtest program to regression test hash_reg.
* Convert croptest program to regression test crop_reg.
* New color segmentation by region growing (colorfill.c)
* New regression tests: colorfill_reg, circle_reg, ccbord_reg.
* Set maxima for all allocations for common leptonica data structures.
* Don't fail when downscaling 2, 4, 8, and 32 bpp images, even
  to one pixel, invoking pixScaleSmooth().
* New functions that select 1 bpp components based on their area.
* Incremental addition to sorted array of numbers.
* new prog/fuzzing directory for oss-fuzz based fuzzing programs
* use of pixcmapIsValid() with extra argument to determine validity
  with the pix it is attached to.
* Use lept_stderr() in all programs in the prog directory.
* New program rasteroptest() for thorough testing of rasterop functions.
* Removed the pixSaveTiled*() functions
* Stubbed pixDisplayWrite().  Last used in tesseract 3.04.01 (2/2016).