updated Harfbuzz to v1.7.4

tools/scripts/install/ttfautohint-build.sh

@@ -38,7 +38,7 @@ BUILD="$HOME/ttfautohint-build"
 
 # The library versions.
 FREETYPE_VERSION="2.8.1"
-HARFBUZZ_VERSION="1.5.1"
+HARFBUZZ_VERSION="1.7.4"
 TTFAUTOHINT_VERSION="1.7"
 
 # Necessary patches (lists of at most 10 URLs each separated by whitespace,