Use python3 rather default python which maybe links to python2 for oe. And add
option for setup.py to install files to right directory.

Upstream-Status: Inappropriate [OE specific]

Signed-off-by: Kai Kang <kai.kang@windriver.com>
---
diff --git a/bin/python/Makefile.in b/bin/python/Makefile.in
index a43a3c1..2e727f2 100644
--- a/bin/python/Makefile.in
+++ b/bin/python/Makefile.in
@@ -55,9 +55,9 @@ install:: ${TARGETS} installdirs
 	${INSTALL_DATA} ${srcdir}/dnssec-coverage.8 ${DESTDIR}${mandir}/man8
 	if test -n "${PYTHON}" ; then \
 		if test -n "${DESTDIR}" ; then \
-			${PYTHON} ${srcdir}/setup.py install --root=${DESTDIR} --prefix=${prefix} ; \
+			${PYTHON} ${srcdir}/setup.py install --root=${DESTDIR} --prefix=${prefix} --install-lib=${PYTHON_SITEPACKAGES_DIR} ; \
 		else \
-			${PYTHON} ${srcdir}/setup.py install --prefix=${prefix} ; \
+			${PYTHON} ${srcdir}/setup.py install --prefix=${prefix} --install-lib=${PYTHON_SITEPACKAGES_DIR} ; \
 		fi \
 	fi
 
diff --git a/configure.in b/configure.in
index 314bb90..867923e 100644
--- a/configure.in
+++ b/configure.in
@@ -227,7 +227,7 @@ AC_ARG_WITH(python,
 [  --with-python=PATH      specify path to python interpreter],
     use_python="$withval", use_python="unspec")
 
-python="python python3 python3.5 python3.4 python3.3 python3.2 python2 python2.7"
+python="python3 python3.5 python3.4 python3.3 python3.2 python2 python2.7"
 
 testargparse='try: import argparse
 except: exit(1)'