ObsoleteFiles.inc possible mistype

[Alexey Shuvaev]

I am not sure should I fill in a PR or not.
I think the entry:

# 20070603: BIND 9.4.1 import
OLD_LIBS+=lib/liblwres.so.10

should read:

# 20070603: BIND 9.4.1 import
OLD_LIBS+=/usr/lib/liblwres.so.10

(Just run sysutils/libchk and it points me to that).