toolchain/47458: make stale .depend message should include the path of the depend file

[christos%zoulas.com@localhost]

>Number:         47458
>Category:       toolchain
>Synopsis:       make stale .depend message should include the path of the 
>depend file
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    toolchain-manager
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Wed Jan 16 22:50:01 +0000 2013
>Originator:     Christos Zoulas
>Release:        NetBSD 5.99.59
>Organization:
        Entropy Busters, LLC
>Environment:
System: NetBSD rebar.astron.com 5.99.59 NetBSD 5.99.59 (GENERIC) #7: Fri Dec 30 
15:19:49 EST 2011 
christos%rebar.astron.com@localhost:/usr/src/sys/arch/amd64/compile/GENERIC 
amd64
Architecture: x86_64
Machine: amd64
>Description:
Without knowing the path to the stale depend file it becomes difficult to
write tools to remove the stale depend files.
>How-To-Repeat:
        Create a bogus dependency in a .d file
>Fix:
        Keep track of the file where the dependency was added.