Update run-test 701 for python3.

Test: testrunner.py --host -t 701
Change-Id: Ia2e769b9b5fea285b4aa473c03bda6041fc60f0a
diff --git a/test/701-easy-div-rem/build b/test/701-easy-div-rem/build
index affb432..6d114b6 100644
--- a/test/701-easy-div-rem/build
+++ b/test/701-easy-div-rem/build
@@ -19,6 +19,6 @@
 
 # Write out the source file.
 mkdir src
-python ./genMain.py
+python3 ./genMain.py
 
 ./default-build "$@"