Fix typo in populating otf_capability method for HarfBuzz
* src/ftcrfont.c (syms_of_ftcrfont_for_pdumper) [HAVE_HARFBUZZ]: * src/ftfont.c (syms_of_ftfont_for_pdumper) [HAVE_HARFBUZZ]: * src/w32uniscribe.c (syms_of_w32uniscribe_for_pdumper) [HAVE_HARFBUZZ]: * src/xftfont.c (syms_of_xftfont_for_pdumper) [HAVE_HARFBUZZ]: Fix typos.