Add dotnet/buildtools submodule

[mono.git] / external / buildtools

diff --git a/external/buildtools b/external/buildtools
new file mode 160000 (submodule)
index 0000000..a446ae4
--- /dev/null
+++ b/external/buildtools
@@ -0,0 +1 @@
+Subproject commit a446ae466ce729b6732133f9b359590ae12030e6