harfbuzz: Update to 2.6.8

Overview of changes leading to 2.6.8
Monday, June 22, 2020
====================================
- New API to fetch glyph alternates from GSUB table.
- hb-coretext build fix for macOS < 10.10.
- Meson build fixes, cmake port removal is postponed but please prepare for
  it and give us feedback.
  Autotools is still our main build system however please consider
  experimenting with meson also for packaging the library.
- New API:
+hb_ot_layout_lookup_get_glyph_alternates()

fonts/harfbuzz/Makefile

@@ -1,6 +1,6 @@
-# $NetBSD: Makefile,v 1.129 2020/06/09 11:27:04 nia Exp $
+# $NetBSD: Makefile,v 1.130 2020/06/29 13:44:02 nia Exp $
 
-DISTNAME=	harfbuzz-2.6.7
+DISTNAME=	harfbuzz-2.6.8
 CATEGORIES=	fonts
 MASTER_SITES=	${MASTER_SITE_GITHUB:=harfbuzz/}
 GITHUB_RELEASE=	${PKGVERSION_NOREV}

fonts/harfbuzz/PLIST

@@ -1,4 +1,4 @@
-@comment $NetBSD: PLIST,v 1.39 2020/05/17 14:43:16 nia Exp $
+@comment $NetBSD: PLIST,v 1.40 2020/06/29 13:44:02 nia Exp $
 bin/hb-ot-shape-closure
 bin/hb-shape
 bin/hb-subset
@@ -31,6 +31,7 @@ include/harfbuzz/hb-ot.h
 include/harfbuzz/hb-set.h
 include/harfbuzz/hb-shape-plan.h
 include/harfbuzz/hb-shape.h
+include/harfbuzz/hb-style.h
 include/harfbuzz/hb-subset.h
 include/harfbuzz/hb-unicode.h
 include/harfbuzz/hb-version.h

fonts/harfbuzz/distinfo

@@ -1,6 +1,6 @@
-$NetBSD: distinfo,v 1.96 2020/06/09 11:27:04 nia Exp $
+$NetBSD: distinfo,v 1.97 2020/06/29 13:44:02 nia Exp $
 
-SHA1 (harfbuzz-2.6.7.tar.xz) = caeec8262fbd90a77b62c928b6c033a1b104546b
-RMD160 (harfbuzz-2.6.7.tar.xz) = 9dfd705de65c4cae20e3838cefa0c114c15d8444
-SHA512 (harfbuzz-2.6.7.tar.xz) = 6fdd6e0952a73e1949349aa5416ef8fb3fc351b15c95be4fe1f341b111159fe58113b73a334db2697f4e3aaef5a761bd8f1d8964514406cad40f9862768d59de
-Size (harfbuzz-2.6.7.tar.xz) = 9001936 bytes
+SHA1 (harfbuzz-2.6.8.tar.xz) = 22f3b273b8db325d1638417a9f3359fc652bea30
+RMD160 (harfbuzz-2.6.8.tar.xz) = 096f89bbe8a49e4351845a198a93f831d4d1fdcc
+SHA512 (harfbuzz-2.6.8.tar.xz) = 651b23d7d4fab6fef472ee57db39bbaebc31c2f40ea3a482c1499ad1a7b549b86a2bccbe9da191c8e9ecdf464191dd3c9a7485546b51695ad8ab3c0329732d9d
+Size (harfbuzz-2.6.8.tar.xz) = 8976516 bytes