VMS: turning off CALL_DEBUG isn't possible on Alpha

Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/2962)
diff --git a/NOTES.VMS b/NOTES.VMS
index 4874372..384d5dc 100644
--- a/NOTES.VMS
+++ b/NOTES.VMS
@@ -64,13 +64,19 @@
  prompt.  Unfortunately, this disrupts all other uses, such as running
  test programs in the test framework.
 
+ Generally speaking, if you build for debugging, only use the programs
+ directly for debugging.  Do not try to use them from a script, such
+ as running the test suite.
+
+ *The following is not available on Alpha*
+
  As a compromise, we're turning off the flag that makes the debugger
  start automatically.  If there is a program that you need to debug,
  you need to turn that flag back on first, for example:
 
     $ set image /flag=call_debug [.test]evp_test.exe
 
- Then just run it and you will find yourself in a debuggin session.
+ Then just run it and you will find yourself in a debugging session.
  When done, we recomment that you turn that flag back off:
 
     $ set image /flag=nocall_debug [.test]evp_test.exe