build: move python setuptools for future non-autotools

The current setup.py.in is an autotools-generated setuptools-like
install script.  When building the python-only module, we don't
need the complexity of autotools, but the well-supported python
install behavior is for a script named 'setup.py'.  In order to
facilitiate creating a native setuptools setup.py, move the autotools
one to a different name.  This allows both to live in parallel for a
bit.

Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
Change-Id: I496a7891451649a06f6761f082195330a53cb967
diff --git a/.gitignore b/.gitignore
index a62370b..4b97ff5 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,7 +4,7 @@
 *.pyc
 *.pyo
 /tools/build
-/tools/setup.py
+/tools/setup_autotools.py
 
 # Test suite logs
 *.log