MFH: r460534 r463853

print/harfbuzz: update to 1.7.6

Changes: https://github.com/harfbuzz/harfbuzz/blob/1.7.5/NEWS
Changes: https://github.com/harfbuzz/harfbuzz/blob/1.7.6/NEWS
ABI: https://abi-laboratory.pro/tracker/timeline/harfbuzz/
Approved by: ports-secteam (riggs)