Could not build r279842 on r278265 -- mount_smbfs vs /lib/libkiconv problems when WITHOUT_ICONV is set

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 I could not build NanoBSD system from r279842 sources on r278265 host
with host tools ("cross-build" with external toolchain).

buildworld fails with

- --- usr.sbin.all__D ---
/lib/libkiconv.so.4: undefined reference to `__bsd_iconv_close_at_FBSD_1.3'
/lib/libkiconv.so.4: undefined reference to `__bsd_iconv_at_FBSD_1.3'
/lib/libkiconv.so.4: undefined reference to `__bsd_iconv_open_at_FBSD_1.3'
cc: error: linker command failed with exit code 1 (use -v to see
invocation)
*** [mount_smbfs] Error code 1

 I have WITHOUT_ICONV=yes, but it worked month ago and I could not
find anything appropriate in UPDATING or with google.

- -- 
// Lev Serebryakov AKA Black Lion
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