build failure for harfbuzz

[Paul Goyette <paul%whooppee.com@localhost>]

Repeatable failure with up-to-date pkgsrc tree:

[88/96] Compiling C++ object src/libharfbuzz-subset.so.0.61101.0.p/hb-subset-plan.cc.o
[89/96] Compiling C++ object src/libharfbuzz-subset.so.0.61101.0.p/hb-subset.cc.o
ninja: build stopped: subcommand failed.
*** Error code 1


+---------------------+--------------------------+----------------------+
| Paul Goyette (.sig) | PGP Key fingerprint:     | E-mail addresses:    |
| (Retired)           | 1B11 1849 721C 56C8 F63A | paul%whooppee.com@localhost    |
| Software Developer  | 6E2E 05FD 15CE 9F2D 5102 | pgoyette%netbsd.org@localhost  |
| & Network Engineer  |                          | pgoyette99%gmail.com@localhost |
+---------------------+--------------------------+----------------------+