Update harfbuzz port from 2.8.1 to 3.2.0 (#16131)

My main motivation here is that it fixes a bunch of compiler warnings
that otherwise generate a lot of noise when building this port.

Author: sbc100

tools/ports/harfbuzz.py

@@ -6,8 +6,8 @@
 import os
 import logging
 
-TAG = '2.8.1'
-HASH = 'c969ec1677f2f023c05698a226c96b23a815db732f1561d486b25b07c3663ea8192e49ee1253b7b623b43d713b9230df3265a47da6fd65378256ecada90c6ae4'
+TAG = '3.2.0'
+HASH = 'c9d88068d8017046842f444f02f31dbae109026ede943aaf265db5508de8b4b2be84203950f274a237f515bf7cbd361629d2032c6e8ee8f50354b430bba3a8ca'
 
 deps = ['freetype']