dpkg-buildpackage(1): Add missing "hook" after postclean description

Reported-by: Helge Kreutzmann <debian@helgefjell.de>

man/dpkg-buildpackage.1

@@ -62,7 +62,7 @@ generate a \fB.changes\fP file.
 Many \fBdpkg\-buildpackage\fP options are forwarded to
 \fBdpkg\-genchanges\fP.
 .IP \fB7.\fP 3
-It runs the \fBpostclean\fP and if \fB\-tc\fP is specified, it will
+It runs the \fBpostclean\fP hook and if \fB\-tc\fP is specified, it will
 call \fBfakeroot debian/rules clean\fP again.
 .IP \fB8.\fP 3
 It calls \fBdpkg\-source \-\-after\-build\fP.