Call swig with -python because we never need -noproxy

This should fix "make dist" even when you don't enable the python bindings

git-svn-id: svn+ssh://svn.gnucash.org/repo/gnucash/trunk@18046 57a11ea4-9604-0410-9ed3-97b8803252fd

src/optional/python-bindings/Makefile.am

@@ -38,7 +38,7 @@ _gnucash_core_c_la_LIBADD = \
 
 if BUILDING_FROM_SVN
 gnucash_core.c: $(SWIG_SOURCES)
-	swig $(SWIG_PYTHON_OPT) -Wall -Werror \
+	swig -python -Wall -Werror \
         -I$(top_srcdir)/src -I$(top_srcdir)/src/engine \
 		-I$(top_srcdir)/src/business/business-core \
         -I${top_srcdir}/src/libqof/qof \