Author: Tomo Tsuyuki
MDL-45301 assign: Add font options for EditPDF
http://git.moodle.org/gw?p=moodle.git;a=commit;h=9e725bc168d63a5a4034622b5e6a7868014c1b67
http://github.com/moodle/moodle/commit/9e725bc168d63a5a4034622b5e6a7868014c1b67
+ 4.2 en [enablepdfexportfont,core_admin]
+ 4.2 en [enablepdfexportfont_desc,core_admin]
+ 4.2 en [pdfexportfont,core_course]
+ 4.2 en [pdfexportfont_help,core_course]