autoconf/python: check for distutils

Require distutils to install the Python tools. Update the logic
to only install suricatactl (and suricatasc) if Python and
distutils are found. Suricata-Update will only be installed if
bundled, and python-distutils and python-yaml are found.

python/Makefile.am

@@ -4,6 +4,7 @@ EXTRA_DIST =	setup.py \
 		suricatasc
 
 if HAVE_PYTHON
+if HAVE_PYTHON_DISTUTILS
 all-local:
 	cd $(srcdir) && \
 		$(HAVE_PYTHON) setup.py build --build-base $(abs_builddir)
@@ -30,3 +31,4 @@ clean-local:
 distclean-local:
 	rm -f version
 endif
+endif