Replace 'ap' with 'up' suffix in variable names. (NFC)

The `ap` suffix is a remnant of lldb's former use of auto pointers,
before they got deprecated. Although all their uses were replaced by
unique pointers, some variables still carried the suffix.

In r353795 I removed another auto_ptr remnant, namely redundant calls to
::get for unique_pointers. Jim justly noted that this is a good
opportunity to clean up the variable names as well.

I went over all the changes to ensure my find-and-replace didn't have
any undesired side-effects. I hope I didn't miss any, but if you end up
at this commit doing a git blame on a weirdly named variable, please
know that the change was unintentional.

llvm-svn: 353912
diff --git a/lldb/source/Commands/CommandObjectHelp.cpp b/lldb/source/Commands/CommandObjectHelp.cpp
index b39323e..3804bbe 100644
--- a/lldb/source/Commands/CommandObjectHelp.cpp
+++ b/lldb/source/Commands/CommandObjectHelp.cpp
@@ -20,8 +20,9 @@
 //-------------------------------------------------------------------------
 
 void CommandObjectHelp::GenerateAdditionalHelpAvenuesMessage(
-    Stream *s, llvm::StringRef command, llvm::StringRef prefix, llvm::StringRef subcommand,
-    bool include_apropos, bool include_type_lookup) {
+    Stream *s, llvm::StringRef command, llvm::StringRef prefix,
+    llvm::StringRef subcommand, bool include_upropos,
+    bool include_type_lookup) {
   if (!s || command.empty())
     return;
 
@@ -32,7 +33,7 @@
   s->Printf("'%s' is not a known command.\n", command_str.c_str());
   s->Printf("Try '%shelp' to see a current list of commands.\n",
             prefix.str().c_str());
-  if (include_apropos) {
+  if (include_upropos) {
     s->Printf("Try '%sapropos %s' for a list of related commands.\n",
       prefix_str.c_str(), lookup_str.c_str());
   }