Log Message:
netsurf: mark as not make-jobs-safe

Due to

gmake[1]: *** No rule to make target \ 
'build-x86_64--netbsd-x86_64--netbsd-release-lib-static/filter-lexer.inc', \ 
needed by \ 
'build-x86_64--netbsd-x86_64--netbsd-release-lib-static/filter-lexer.c'.  Stop.

and

src/filter-parser.y:15:10: fatal error: filter-lexer.h: No such file or directory