Update BuildTools to 3.0.0-preview1-03623-01 (#5032)

This uptakes a change to print the tree being submitted to dotnet/versions. This will confirm whether BuildTools isn't being uptaken correctly in the official build, or if there is a new/unknown additional bug with the request.
2019-01-23 13:11:35 -06:00 · 2019-01-23 13:11:35 -06:00 · 3d0f5a99a4
--- a/BuildToolsVersion.txt
+++ b/BuildToolsVersion.txt
@ -1 +1 @@
-3.0.0-preview1-03617-02
+3.0.0-preview1-03623-01