freebsd.sh: install py36-pip

Signed-off-by: Arthur She <arthur.she@linaro.org>
Change-Id: I2f0f84fb416da2c3280cf3187430ffb91196b5df
diff --git a/freebsd.sh b/freebsd.sh
index b7e43f1..a40fdcc 100644
--- a/freebsd.sh
+++ b/freebsd.sh
@@ -16,7 +16,8 @@
     lsof \
     gmake \
     perl5 \
-    bash
+    bash \
+    py36-pip
 
 mount -t fdescfs fdesc /dev/fd
 mount -t procfs proc /proc