* Update ilmbase to 1.0.3
* Update build to latest standards

	new file:   libs_devel/ilmbase/ilmbase-1.0.3-pkgconfigdir.patch.xz
	modified:   libs_devel/ilmbase/ilmbase.build
* Update OpenEXR to 1.7.1 (soname bump)
* Update build to latest standards

	renamed:    libs_graphics/openexr/openexr-1.7.0-cstring.patch.xz -> libs_graphics/openexr/openexr-1.7.1-cstring.patch.xz
	new file:   libs_graphics/openexr/openexr-1.7.1-pkgconfigdir.patch.xz
	modified:   libs_graphics/openexr/openexr.build