Fix shared framework deb package name in response to dotnet/core-setup#2461

Author: eerhardt

build/package/Installer.DEB.targets

@@ -29,7 +29,7 @@
       <SdkDebianPackageVersion>$(SdkVersion)</SdkDebianPackageVersion>
       <SdkDebianPackageName>dotnet-dev-$(SdkDebianPackageVersion)</SdkDebianPackageName>
       <SharedFxDebianPackageVersion>$(SharedFrameworkVersion)</SharedFxDebianPackageVersion>
-      <SharedFxDebianPackageName>dotnet-sharedframework-$(SharedFrameworkName)-$(SharedFxDebianPackageVersion)</SharedFxDebianPackageName>
+      <SharedFxDebianPackageName>dotnet-runtime-$(SharedFxDebianPackageVersion)</SharedFxDebianPackageName>
       <SharedFxDebianPackageName>$(SharedFxDebianPackageName.ToLower())</SharedFxDebianPackageName>
       <HostFxrDebianPackageVersion>$(HostFxrVersion)</HostFxrDebianPackageVersion>
       <HostFxrDebianPackageName>dotnet-hostfxr-$(HostFxrDebianPackageVersion)</HostFxrDebianPackageName>