build break on port-amd64

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

With up-to-date sources:

#      link  binstall/xinstall
cc -O -I/test-bed/obj/tools/compat -I/test-bed/obj/tools/compat/include 
-I/test-bed/src/tools/compat -DHAVE_NBTOOL_CONFIG_H=1 -D_FILE_OFFSET_BITS=64 
-I/test-bed/src/tools/binstall/../compat/sys 
-DTARGET_STRIP=\"/test-bed/tools/bin/x86_64--netbsd-strip\" 
-I/test-bed/src/usr.sbin/mtree   -o xinstall xinstall.lo getid.lo 
-L/test-bed/obj/tools/compat -lnbcompat -lz
xinstall.lo: In function `do_symlink':
xinstall.c:(.text+0x604): warning: warning: mktemp() possibly used unsafely, 
use mkstemp() or mkdtemp()
#    format  binstall/install.html1
/test-bed/tools/bin/nbmandoc -Thtml -Oman=../html%S/%N.html -Ostyle=../style.css  
/test-bed/src/tools/binstall/../../usr.bin/xinstall/install.1 > install.html1.tmp 
&&  mv install.html1.tmp install.html1
sh: /test-bed/tools/bin/nbmandoc: not found

*** Failed target:  install.html1
*** Failed command: /test-bed/tools/bin/nbmandoc -Thtml -Oman=../html%S/%N.html 
-Ostyle=../style.css /test-bed/src/tools/binstall/../../usr.bin/xinstall/install.1 > 
install.html1.tmp && mv install.html1.tmp install.html1
*** Error code 127

Stop.
nbmake: stopped in /test-bed/src/tools/binstall

*** Failed target:  dependall
*** Failed command: cd "/test-bed/src/tools/binstall"; 
/test-bed/tools/bin/nbmake realall
*** Error code 1

Stop.
nbmake: stopped in /test-bed/src/tools/binstall


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| Paul Goyette     | PGP Key fingerprint:     | E-mail addresses:       |
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| Network Engineer | 0786 F758 55DE 53BA 7731 | pgoyette at juniper.net |
| Kernel Developer |                          | pgoyette at netbsd.org  |
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