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/configure.ac b/configure.ac
index 45c50b3..34a49be 100644
--- a/configure.ac
+++ b/configure.ac
@@ -185,7 +185,7 @@
 AM_CONDITIONAL(BOOST, [test "x$enable_boost" = "xyes"])
 
 # Create configured output
-AC_CONFIG_FILES([Makefile test/Makefile tools/Makefile tools/setup.py])
+AC_CONFIG_FILES([Makefile test/Makefile tools/Makefile tools/setup_autotools.py])
 AC_CONFIG_FILES([example/Makefile])
 AC_CONFIG_FILES([sdbusplus.pc])
 AC_OUTPUT