[shortfin] Add separate version_info.json

Also removes the no longer required .gitignore which prevents adding the
version_info file. Furthermore, fixes the path to the file which is not
present in the build directory.

Author: marbre

shortfin/.gitignore

@@ -141,7 +141,7 @@ def copy_extensions_to_source(self, *args, **kwargs):
 
 
 # Setup and get version information.
-VERSION_INFO_FILE = os.path.join(SOURCE_DIR, "version_info.json")
+VERSION_INFO_FILE = os.path.join(SETUPPY_DIR, "version_info.json")
 
 
 def load_version_info():

shortfin/setup.py

@@ -0,0 +1,3 @@
+{
+  "package-version": "0.1.dev3"
+}