Quick fix of build/test scripts for .NET Core

- Can only build with netcoreapp2.2 on linux - add a test.bat/test.sh script - needs to be improved!

Author: Christophe Chevalier

build.sh

@@ -1,2 +1,4 @@
 #!/bin/bash
-dotnet build FoundationDB.Client.sln -c Debug --version-suffix dev
+dotnet build FoundationDB.Client/FoundationDB.Client.csproj -c Debug -f netstandard2.0 --version-suffix dev
+dotnet build FdbShell/FdbShell.csproj -c Debug -f netcoreapp2.2 --version-suffix dev
+dotnet build FdbTop/FdbTop.csproj -c Debug -f netcoreapp2.2 --version-suffix dev

test.bat

@@ -0,0 +1,4 @@
+@echo off
+
+dotnet test FoundationDB.Tests\FoundationDB.Tests.csproj -c Debug -- RunConfiguration.TargetPlatform=x64
+REM pause

test.sh

@@ -0,0 +1,2 @@
+#!/bin/bash
+dotnet test FoundationDB.Tests/FoundationDB.Tests.csproj -c Debug