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/Expression/LLVMUserExpression.cpp b/lldb/source/Expression/LLVMUserExpression.cpp
index 396a7e2..83acb82 100644
--- a/lldb/source/Expression/LLVMUserExpression.cpp
+++ b/lldb/source/Expression/LLVMUserExpression.cpp
@@ -106,7 +106,7 @@
         return lldb::eExpressionSetupError;
       }
 
-      Error interpreter_error;
+      Status interpreter_error;
 
       std::vector<lldb::addr_t> args;
 
@@ -270,7 +270,7 @@
     return false;
   }
 
-  Error dematerialize_error;
+  Status dematerialize_error;
 
   m_dematerializer_sp->Dematerialize(dematerialize_error, function_stack_bottom,
                                      function_stack_top);
@@ -309,7 +309,7 @@
 
   if (m_jit_start_addr != LLDB_INVALID_ADDRESS || m_can_interpret) {
     if (m_materialized_address == LLDB_INVALID_ADDRESS) {
-      Error alloc_error;
+      Status alloc_error;
 
       IRMemoryMap::AllocationPolicy policy =
           m_can_interpret ? IRMemoryMap::eAllocationPolicyHostOnly
@@ -335,7 +335,7 @@
     struct_address = m_materialized_address;
 
     if (m_can_interpret && m_stack_frame_bottom == LLDB_INVALID_ADDRESS) {
-      Error alloc_error;
+      Status alloc_error;
 
       const size_t stack_frame_size = 512 * 1024;
 
@@ -357,7 +357,7 @@
       }
     }
 
-    Error materialize_error;
+    Status materialize_error;
 
     m_dematerializer_sp = m_materializer_ap->Materialize(
         frame, *m_execution_unit_sp, struct_address, materialize_error);