Temporarily fix build scripts due to CLI bug

Latest versions of .NET CLI ignore --output and instead publish to a
long path inside of it. Until this is resolved properly, we can work
around it by copying to the expected location.

Revert this when CLI is fixed.

build.sh

@@ -34,6 +34,8 @@ mkdir -p $BIN/Modules
 (
     cd src/Microsoft.PowerShell.Linux.Host
     dotnet publish --framework dnxcore50 --output $BIN
+    # Temporary fix for dotnet publish
+    cp $BIN/Debug/dnxcore50/* $BIN
     # Copy files that dotnet-publish does not currently deploy
     cp *_profile.ps1 $BIN
 )