patch 8.2.0710: Netbeans test sometimes fails

Problem:    Netbeans test sometimes fails.
Solution:   Mark any test using an external command as flaky.
diff --git a/src/version.c b/src/version.c
index c7fc8ee..2004f56 100644
--- a/src/version.c
+++ b/src/version.c
@@ -747,6 +747,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    710,
+/**/
     709,
 /**/
     708,