firefow-52.0.2 build failure

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

With up-to-date pkgsrc, I'm getting the following errors

rm -f libdb_sqlite3_src.a
/tmp/pkgs/www/firefox/work.x86_64/build/_virtualenv/bin/python /tmp/pkgs/www/firefox/work.x86_64/firefox-52.0.2/config/expandlibs_gen.py -o libdb_sqlite3_src.a.desc sqlite3.o
gmake[3]: Leaving directory '/tmp/pkgs/www/firefox/work.x86_64/build/db/sqlite3/src'
gmake[2]: Leaving directory '/tmp/pkgs/www/firefox/work.x86_64/build'
/tmp/pkgs/www/firefox/work.x86_64/firefox-52.0.2/config/recurse.mk:32: recipe for target 'compile' failed
gmake[1]: *** [compile] Error 2
gmake[1]: Leaving directory '/tmp/pkgs/www/firefox/work.x86_64/build'
/tmp/pkgs/www/firefox/work.x86_64/firefox-52.0.2/config/rules.mk:523: recipe for target 'all' failed
gmake: *** [all] Error 2


+------------------+--------------------------+----------------------------+
| Paul Goyette     | PGP Key fingerprint:     | E-mail addresses:          |
| (Retired)        | FA29 0E3B 35AF E8AE 6651 | paul at whooppee dot com   |
| Kernel Developer | 0786 F758 55DE 53BA 7731 | pgoyette at netbsd dot org |
+------------------+--------------------------+----------------------------+