testsuite: port detect-loop test to module-playground
diff --git a/testsuite/populate-modules.sh b/testsuite/populate-modules.sh
index 8f3f9dd..f41501d 100755
--- a/testsuite/populate-modules.sh
+++ b/testsuite/populate-modules.sh
@@ -11,6 +11,11 @@
     ["test-depmod/search-order-simple/lib/modules/4.4.4/updates/"]="mod-simple.ko"
     ["test-depmod/search-order-same-prefix/lib/modules/4.4.4/foo/"]="mod-simple.ko"
     ["test-depmod/search-order-same-prefix/lib/modules/4.4.4/foobar/"]="mod-simple.ko"
+    ["test-depmod/detect-loop/lib/modules/4.4.4/kernel/mod-loop-a.ko"]="mod-loop-a.ko"
+    ["test-depmod/detect-loop/lib/modules/4.4.4/kernel/mod-loop-b.ko"]="mod-loop-b.ko"
+    ["test-depmod/detect-loop/lib/modules/4.4.4/kernel/mod-loop-c.ko"]="mod-loop-c.ko"
+    ["test-depmod/detect-loop/lib/modules/4.4.4/kernel/mod-loop-d.ko"]="mod-loop-d.ko"
+    ["test-depmod/detect-loop/lib/modules/4.4.4/kernel/mod-loop-e.ko"]="mod-loop-e.ko"
     ["test-dependencies/lib/modules/4.0.20-kmod/kernel/fs/foo/"]="mod-foo-b.ko"
     ["test-dependencies/lib/modules/4.0.20-kmod/kernel/"]="mod-foo-c.ko"
     ["test-dependencies/lib/modules/4.0.20-kmod/kernel/lib/"]="mod-foo-a.ko"
@@ -23,6 +28,10 @@
     dst=${ROOTFS}/$k
     src=${MODULE_PLAYGROUND}/${map[$k]}
 
-    install -d $dst
-    install -t $dst $src
+    if test "${dst: -1}" = "/"; then
+        install -d $dst
+        install -t $dst $src
+    else
+        install -D $src $dst
+    fi
 done