Rename VERSION to VERSION.info to avoid conflicts with modern STL

On case-insensitive file systems (e.g., macOS), inclusion of the new
standard <version> header resulted in unexpected inclusion of VERSION
file.

Change-Id: I84d6e37fd5f31666ced4b8b47816ff28dd911f17
diff --git a/.gitignore b/.gitignore
index b1d7223..6ff803e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -29,4 +29,4 @@
 *.py[cod]
 
 # Other
-/VERSION
+/VERSION.info