Update System.Resources.Extensions pkgdef version (#7635)
Update System.Resources.Extensions pkgdef version (#7635)

To match the version we're shipping as of b362620217.
AndyGerlicher/msbuild,rainersigwald/msbuild,sean-gilliam/msbuild,rainersigwald/msbuild,sean-gilliam/msbuild,AndyGerlicher/msbuild,rainersigwald/msbuild,AndyGerlicher/msbuild,sean-gilliam/msbuild,rainersigwald/msbuild,sean-gilliam/msbuild,AndyGerlicher/msbuild