Rename Error -> Status.

This renames the LLDB error class to Status, as discussed
on the lldb-dev mailing list.

A change of this magnitude cannot easily be done without
find and replace, but that has potential to catch unwanted
occurrences of common strings such as "Error".  Every effort
was made to find all the obvious things such as the word "Error"
appearing in a string, etc, but it's possible there are still
some lingering occurences left around.  Hopefully nothing too
serious.

llvm-svn: 302872
diff --git a/lldb/source/Interpreter/OptionValueString.cpp b/lldb/source/Interpreter/OptionValueString.cpp
index 149ccbc..1d7332d 100644
--- a/lldb/source/Interpreter/OptionValueString.cpp
+++ b/lldb/source/Interpreter/OptionValueString.cpp
@@ -47,9 +47,9 @@
   }
 }
 
-Error OptionValueString::SetValueFromString(llvm::StringRef value,
-                                            VarSetOperationType op) {
-  Error error;
+Status OptionValueString::SetValueFromString(llvm::StringRef value,
+                                             VarSetOperationType op) {
+  Status error;
 
   std::string value_str = value.str();
   value = value.trim();
@@ -127,27 +127,27 @@
   return OptionValueSP(new OptionValueString(*this));
 }
 
-Error OptionValueString::SetCurrentValue(llvm::StringRef value) {
+Status OptionValueString::SetCurrentValue(llvm::StringRef value) {
   if (m_validator) {
-    Error error(m_validator(value.str().c_str(), m_validator_baton));
+    Status error(m_validator(value.str().c_str(), m_validator_baton));
     if (error.Fail())
       return error;
   }
   m_current_value.assign(value);
-  return Error();
+  return Status();
 }
 
-Error OptionValueString::AppendToCurrentValue(const char *value) {
+Status OptionValueString::AppendToCurrentValue(const char *value) {
   if (value && value[0]) {
     if (m_validator) {
       std::string new_value(m_current_value);
       new_value.append(value);
-      Error error(m_validator(value, m_validator_baton));
+      Status error(m_validator(value, m_validator_baton));
       if (error.Fail())
         return error;
       m_current_value.assign(new_value);
     } else
       m_current_value.append(value);
   }
-  return Error();
+  return Status();
 }