pylibfdt:tests: Extend the way how to find a Python module

Python 3 C extensions have suffix containing platform, Python version
and another details in the name so the condition has to be extended.

Signed-off-by: Lumir Balhar <lbalhar@redhat.com>
Message-Id: <20190218164856.23861-5-frenzy@frenzy.cz>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>

tests/run_tests.sh

@@ -973,7 +973,7 @@ if [ -z "$TESTSETS" ]; then
     TESTSETS="libfdt utilfdt dtc dtbs_equal fdtget fdtput fdtdump fdtoverlay"
 
     # Test pylibfdt if the libfdt Python module is available.
-    if [ -f ../pylibfdt/_libfdt.so ]; then
+    if [ -f ../pylibfdt/_libfdt.so ] || [ -f ../pylibfdt/_libfdt.cpython-3*.so ]; then
         TESTSETS="$TESTSETS pylibfdt"
     fi
 fi