Update some command aliasing functions to use StringRef.

llvm-svn: 283385
diff --git a/lldb/source/Commands/CommandObjectHelp.cpp b/lldb/source/Commands/CommandObjectHelp.cpp
index 1495e93..7d1fdcf 100644
--- a/lldb/source/Commands/CommandObjectHelp.cpp
+++ b/lldb/source/Commands/CommandObjectHelp.cpp
@@ -174,7 +174,7 @@
 
       if (is_alias_command) {
         StreamString sstr;
-        m_interpreter.GetAlias(alias_name.c_str())->GetAliasExpansion(sstr);
+        m_interpreter.GetAlias(alias_name)->GetAliasExpansion(sstr);
         result.GetOutputStream().Printf("\n'%s' is an abbreviation for %s\n",
                                         alias_name.c_str(), sstr.GetData());
       }