nmap: change shebang to python3

upstream nmap is python2 compatiable now, but this recipe
supports python3.

Signed-off-by: Changqing Li <changqing.li@windriver.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>

meta-oe/recipes-security/nmap/nmap_7.80.bb

@@ -50,9 +50,11 @@ do_configure() {
 }
 
 do_install_append() {
-    if [ -f "${D}${bindir}/ndiff" ]; then
-       sed -i 's@^#!.*$@#!/usr/bin/env python3@g'   ${D}${bindir}/ndiff
-    fi
+    for f in ndiff uninstall_ndiff; do
+        if [ -f ${D}${bindir}/$f ]; then
+            sed -i 's@^#!.*$@#!/usr/bin/env python3@g' ${D}${bindir}/$f
+        fi
+    done
 }
 
 FILES_${PN} += "${PYTHON_SITEPACKAGES_DIR} ${datadir}/ncat"