test-execute: add a testcase for MountAPIVFS=no

test/test-execute/exec-mount-apivfs-no.service

@@ -0,0 +1,15 @@
+[Unit]
+Description=Test for find_executable() with MountAPIVFS=no
+
+[Service]
+Type=oneshot
+
+MountAPIVFS=false
+PrivateDevices=false
+PrivateMounts=true
+PrivateTmp=false
+PrivateUsers=false
+ProtectControlGroups=false
+ProtectKernelModules=false
+ProtectKernelTunables=false
+RootDirectory=/tmp/test-exec-mount-apivfs-no/root

test/test-functions

@@ -148,6 +148,7 @@ BASICTOOLS=(
     head
     ionice
     ip
+    ldd
     ln
     loadkeys
     login