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/Plugins/Language/CPlusPlus/LibCxx.cpp b/lldb/source/Plugins/Language/CPlusPlus/LibCxx.cpp
index 659a12b..11245e1 100644
--- a/lldb/source/Plugins/Language/CPlusPlus/LibCxx.cpp
+++ b/lldb/source/Plugins/Language/CPlusPlus/LibCxx.cpp
@@ -26,7 +26,7 @@
 #include "lldb/Target/Target.h"
 #include "lldb/Utility/DataBufferHeap.h"
 #include "lldb/Utility/Endian.h"
-#include "lldb/Utility/Error.h"
+#include "lldb/Utility/Status.h"
 #include "lldb/Utility/Stream.h"
 
 using namespace lldb;
@@ -53,7 +53,7 @@
     return true;
   } else {
     bool print_pointee = false;
-    Error error;
+    Status error;
     ValueObjectSP pointee_sp = ptr_sp->Dereference(error);
     if (pointee_sp && error.Success()) {
       if (pointee_sp->DumpPrintableRepresentation(
@@ -181,7 +181,7 @@
         });
         DataBufferSP buffer_sp(new DataBufferHeap(tree_node_type.GetByteSize(nullptr),0));
         ProcessSP process_sp(target_sp->GetProcessSP());
-        Error error;
+        Status error;
         process_sp->ReadMemory(addr, buffer_sp->GetBytes(), buffer_sp->GetByteSize(), error);
         if (error.Fail())
           return false;