Update harfbuzz-ng to 0.9.14 from 0.9.10

third_party/harfbuzz-ng/src/hb-buffer.h

Index: third_party/harfbuzz-ng/src/hb-buffer.h
===================================================================
--- third_party/harfbuzz-ng/src/hb-buffer.h	(리비전 191245)
+++ third_party/harfbuzz-ng/src/hb-buffer.h	(작업 사본)
@@ -193,7 +193,7 @@
 
 /* Like reset, but does NOT clear unicode_funcs. */
 void
-hb_buffer_clear (hb_buffer_t *buffer);
+hb_buffer_clear_contents (hb_buffer_t *buffer);
 
 /* Returns false if allocation failed */
 hb_bool_t
@@ -304,7 +304,7 @@
 			    unsigned int end,
 			    char *buf,
 			    unsigned int buf_size,
-			    unsigned int *buf_consumed,
+			    unsigned int *buf_consumed, /* May be NULL */
 			    hb_font_t *font, /* May be NULL */
 			    hb_buffer_serialize_format_t format,
 			    hb_buffer_serialize_flags_t flags);
@@ -312,8 +312,8 @@
 hb_bool_t
 hb_buffer_deserialize_glyphs (hb_buffer_t *buffer,
 			      const char *buf,
-			      unsigned int buf_len,
-			      unsigned int *buf_consumed,
+			      int buf_len, /* -1 means nul-terminated */
+			      const char **end_ptr, /* May be NULL */
 			      hb_font_t *font, /* May be NULL */
 			      hb_buffer_serialize_format_t format);