pkg/51054: pkgsrc pango build failure

[bch <brad.harder%gmail.com@localhost>]

>Number:         51054
>Category:       pkg
>Synopsis:       pkgsrc/devel/pango fails to install
>Confidential:   no
>Severity:       serious
>Priority:       high
>Responsible:    pkg-manager
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Fri Apr 08 19:15:00 +0000 2016
>Originator:     bch <brad.harder%gmail.com@localhost>
>Release:        NetBSD 7.99.27
>Organization:
	Method Logic Digital
>Environment:
System: NetBSD strathcona 7.99.27 NetBSD 7.99.27 (GENERIC.dtrace) #6:
Fri Apr 8 09:55:52 PDT 2016
root@strathcona:/usr/obj/sys/arch/amd64/compile/GENERIC.dtrace amd64
Architecture: x86_64
Machine: amd64
>Description:


build fails w/
  gmake[1]: *** No rule to make target
'/usr/pkg/share/gobject-introspection-1.0/Makefile.introspection'.
Stop.

[...]
Making install in pango
gmake[1]: Entering directory '/usr/pkgsrc/devel/pango/work/pango-1.40.0/pango'
Makefile:1828: /usr/pkg/share/gobject-introspection-1.0/Makefile.introspection:
No such file or directory
gmake[1]: *** No rule to make target
'/usr/pkg/share/gobject-introspection-1.0/Makefile.introspection'.
Stop.
gmake[1]: Leaving directory '/usr/pkgsrc/devel/pango/work/pango-1.40.0/pango'
Makefile:579: recipe for target 'install-recursive' failed
gmake: *** [install-recursive] Error 1
[...]

>How-To-Repeat:
	make install in pkgsrc/devel/pango w/ latest pkgsrc
>Fix: