testsuite: port show-depends tests to module-playground

Another test, modprobe_show_alias_to_none was wrongly checking the
output in the show-depends namespace so it needed changing as well.
diff --git a/testsuite/populate-modules.sh b/testsuite/populate-modules.sh
index f41501d..bef3db1 100755
--- a/testsuite/populate-modules.sh
+++ b/testsuite/populate-modules.sh
@@ -22,6 +22,9 @@
     ["test-dependencies/lib/modules/4.0.20-kmod/kernel/fs/"]="mod-foo.ko"
     ["test-init/"]="mod-simple.ko"
     ["test-remove/"]="mod-simple.ko"
+    ["test-modprobe/show-depends/lib/modules/4.4.4/kernel/mod-loop-a.ko"]="mod-loop-a.ko"
+    ["test-modprobe/show-depends/lib/modules/4.4.4/kernel/mod-loop-b.ko"]="mod-loop-b.ko"
+    ["test-modprobe/show-depends/lib/modules/4.4.4/kernel/mod-simple.ko"]="mod-simple.ko"
 )
 
 for k in ${!map[@]}; do