port amd64 - netbsd32_machdep.c build failure

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

This from sources just updated minutes ago...

/build/src/sys/arch/amd64/amd64/netbsd32_machdep.c: In function 
'netbsd32_sendsig_siginfo':
/build/src/sys/arch/amd64/amd64/netbsd32_machdep.c:353: error: 
'CLEARSIG' undeclared (first use in this function)
/build/src/sys/arch/amd64/amd64/netbsd32_machdep.c:353: error: (Each 
undeclared identifier is reported only once
/build/src/sys/arch/amd64/amd64/netbsd32_machdep.c:353: error: for each 
function it appears in.)


----------------------------------------------------------------------
|   Paul Goyette   | PGP DSS Key fingerprint: |  E-mail addresses:   |
| Customer Service | FA29 0E3B 35AF E8AE 6651 |  paul%whooppee.com@localhost   |
| Network Engineer | 0786 F758 55DE 53BA 7731 | pgoyette%juniper.net@localhost |
----------------------------------------------------------------------