Use rsa-sign to create signature.

Rev: src/nettle/examples/rsa-verify-test:1.2

examples/rsa-verify-test

@@ -7,11 +7,9 @@ fi
 data="$srcdir/nettle-benchmark.c"
 
 if [ -x rsa-verify ] ; then
-  if ./rsa-verify testkey.pub testsignature < "$data" ; then
-    :
-  else
-    exit 1;
-  fi
+  ./rsa-sign testkey < "$data" > testsignature \
+    && ./rsa-verify testkey.pub testsignature < "$data" \
+    || exit 1;
   
   # Try modifying the data
   sed s/128/129/ < "$data" >testdata