Resolved system.Runtime references which lead to ApiCompat errors

Commit migrated from https://github.com/dotnet/corefx/commit/b97cfb0e710d8dd296f82a7bfe89918dac74fb2f

src/libraries/System.Diagnostics.Tracing/src/ApiCompatBaseline.net462.txt

+CannotMakeMoreVisible : Visibility of member 'System.Diagnostics.Tracing.EventListener.EventSourceIndex(System.Diagnostics.Tracing.EventSource)' is 'Family' in the implementation but 'Public' in the contract.
+MembersMustExist : Member 'System.Diagnostics.Tracing.EventSource.add_EventCommandExecuted(System.EventHandler<System.Diagnostics.Tracing.EventCommandEventArgs>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Diagnostics.Tracing.EventSource.remove_EventCommandExecuted(System.EventHandler<System.Diagnostics.Tracing.EventCommandEventArgs>)' does not exist in the implementation but it does exist in the contract.
\ No newline at end of file

src/libraries/System.Reflection.DispatchProxy/src/System.Reflection.DispatchProxy.csproj

@@ -20,7 +20,6 @@
     <Compile Include="System\Reflection\DispatchProxyGenerator.cs" />
   </ItemGroup>
   <ItemGroup Condition="'$(TargetGroup)' == 'netcore50aot'">
-    <TargetingPackReference Include="System.Private.CoreLib" />
     <TargetingPackReference Include="System.Private.Interop" />
   </ItemGroup>
   <ItemGroup>

src/libraries/System.Reflection.DispatchProxy/src/project.json

@@ -18,7 +18,8 @@
     },
     "netcore50": {
       "dependencies": {
-        "Microsoft.TargetingPack.Private.NETNative": "1.0.0-rc3-23910"
+        "Microsoft.TargetingPack.Private.NETNative": "1.0.0-rc3-23910",
+        "System.Runtime": "4.0.20"
       }
     }
   }

src/libraries/System.Runtime.Handles/src/System.Runtime.Handles.csproj

@@ -22,6 +22,7 @@
   <ItemGroup Condition="'$(TargetGroup)' == 'netcore50aot'">
     <TargetingPackReference Include="System.Private.CoreLib" />
     <TargetingPackReference Include="System.Private.Interop" />
+    <ProjectReference Include="../../System.Runtime/src/redist/System.Runtime.depproj" />
   </ItemGroup>
   <ItemGroup Condition="'$(TargetGroup)' == 'net46'">
     <TargetingPackReference Include="mscorlib" />

src/libraries/System.Runtime.InteropServices.WindowsRuntime/src/System.Runtime.InteropServices.WindowsRuntime.csproj

@@ -23,7 +23,6 @@
     <TargetingPackReference Include="mscorlib" />
   </ItemGroup>
   <ItemGroup Condition="'$(TargetGroup)' == 'netcore50aot'">
-    <TargetingPackReference Include="System.Private.CoreLib" />
     <TargetingPackReference Include="System.Private.Interop" />
   </ItemGroup>
   <ItemGroup>

src/libraries/System.Runtime.InteropServices.WindowsRuntime/src/project.json

@@ -10,7 +10,8 @@
     },
     "netcore50": {
       "dependencies": {
-        "Microsoft.TargetingPack.Private.NETNative": "1.0.0-rc3-23910"
+        "Microsoft.TargetingPack.Private.NETNative": "1.0.0-rc3-23910",
+        "System.Runtime": "4.0.20"
       }
     },
     "net46": {

src/libraries/System.Threading.Timer/src/System.Threading.Timer.csproj

@@ -22,7 +22,6 @@
   </PropertyGroup>
   <ItemGroup>
     <TargetingPackReference Include="mscorlib" Condition="'$(TargetGroup)' != 'netcore50aot'" />
-    <TargetingPackReference Include="System.Private.CoreLib" Condition="'$(TargetGroup)' == 'netcore50aot'" />
     <TargetingPackReference Include="System.Private.Threading" Condition="'$(TargetGroup)' == 'netcore50aot'" />
   </ItemGroup>
   <ItemGroup>

src/libraries/System.Threading.Timer/src/netcore50aot/project.json

@@ -2,7 +2,8 @@
   "frameworks": {
     "netcore50": {
       "dependencies": {
-        "Microsoft.TargetingPack.Private.NETNative": "1.0.0-rc3-23910"
+        "Microsoft.TargetingPack.Private.NETNative": "1.0.0-rc3-23910",
+        "System.Runtime": "4.0.20"
       }
     }
   }

src/libraries/System.Threading/src/System.Threading.csproj

@@ -36,7 +36,7 @@
     <TargetingPackReference Include="System.Core" />
   </ItemGroup>
   <ItemGroup Condition="'$(TargetGroup)' == 'netcore50aot'">
-    <TargetingPackReference Include="System.Private.CoreLib" />
+    <TargetingPackReference Include="System.Private.CoreLib.Threading" />
     <TargetingPackReference Include="System.Private.Threading" />
   </ItemGroup>
   <ItemGroup>

src/libraries/System.Threading/src/project.json

@@ -7,7 +7,8 @@
     },
     "netcore50": {
       "dependencies": {
-        "Microsoft.TargetingPack.Private.NETNative": "1.0.0-rc3-23910"
+        "Microsoft.TargetingPack.Private.NETNative": "1.0.0-rc3-23910",
+        "System.Runtime": "4.0.20"
       }
     },
     "net46": {