Simplify restore command

Author: AArnott

build.libgit2sharp.sh

@@ -14,8 +14,7 @@ export Configuration=release
 
 # On linux we don't pack because we can't build for net40.
 # We just build for CoreCLR and run tests for it.
-dotnet restore LibGit2Sharp
-dotnet restore LibGit2Sharp.Tests
+dotnet restore
 dotnet build LibGit2Sharp.Tests -f netcoreapp1.0 /property:ExtraDefine="$EXTRADEFINE" /fl /flp:verbosity=detailed
 dotnet test LibGit2Sharp.Tests/LibGit2Sharp.Tests.csproj -f netcoreapp1.0 --no-build