Upgrade to upstream svn revision r1735889. This contains the
CLOSESOCKET_DOESNT_WAKE_UP_ACCEPT pipe fix [1]. It also contains
a slightly different fix for building with boost 1.60, so delete
patch-sdext_source_pdfimport_makefile.mk, which is no longer needed.
Delay running gnome-post-install until the plist has been generated by
post-install so that the icons are detected and gtk-update-icon-cache
gets run when the package is installed. [2]
Add missing USES=shared-mime-info.