[llvm-build] Make Py3 compatible.

llvm-svn: 188424
diff --git a/llvm/utils/llvm-build/llvmbuild/__init__.py b/llvm/utils/llvm-build/llvmbuild/__init__.py
index 7760218..eb20d09 100644
--- a/llvm/utils/llvm-build/llvmbuild/__init__.py
+++ b/llvm/utils/llvm-build/llvmbuild/__init__.py
@@ -1 +1 @@
-from main import main
+from llvmbuild.main import main