Update leptonica to 1.79.0

Also fixed leptonica compiling with openjpeg support

Author: PeacefullyDisturbed

cross_compile_ffmpeg.sh

@@ -795,10 +795,11 @@ build_intel_quicksync_mfx() { # i.e. qsv, disableable via command line switch...
 
 build_libleptonica() {
   build_libjpeg_turbo
-  do_git_checkout https://github.com/DanBloomberg/leptonica.git leptonica_git 387d398138783222148a5866514ae9e4eda872a5
+  do_git_checkout https://github.com/DanBloomberg/leptonica.git leptonica_git 1.79.0
   cd leptonica_git
-    generic_configure "--without-libopenjpeg" # never could quite figure out how to get it to work with jp2 stuffs...I think OPJ_STATIC or something, see issue for tesseract
-    do_make_and_make_install
+    export CPPFLAGS="-DOPJ_STATIC"
+    generic_configure_make_install
+    reset_cppflags
   cd ..
 }