More explicit output for the test program

Without that, the logs were a bit hard to understand if you didn't know what
to expect.

Signed-off-by: Gilles Peskine <Gilles.Peskine@arm.com>
diff --git a/programs/test/dlopen_demo.sh b/programs/test/dlopen_demo.sh
index f488dfb..2dde3eb 100755
--- a/programs/test/dlopen_demo.sh
+++ b/programs/test/dlopen_demo.sh
@@ -41,4 +41,6 @@
 fi
 export DYLD_LIBRARY_PATH
 
+echo "Running dynamic loading test program: $program"
+echo "Loading libraries from: $library_dir"
 "$program"