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/Process/Linux/NativeThreadLinux.h b/lldb/source/Plugins/Process/Linux/NativeThreadLinux.h
index 4269749..b9126b3 100644
--- a/lldb/source/Plugins/Process/Linux/NativeThreadLinux.h
+++ b/lldb/source/Plugins/Process/Linux/NativeThreadLinux.h
@@ -41,14 +41,14 @@
 
   NativeRegisterContextSP GetRegisterContext() override;
 
-  Error SetWatchpoint(lldb::addr_t addr, size_t size, uint32_t watch_flags,
-                      bool hardware) override;
+  Status SetWatchpoint(lldb::addr_t addr, size_t size, uint32_t watch_flags,
+                       bool hardware) override;
 
-  Error RemoveWatchpoint(lldb::addr_t addr) override;
+  Status RemoveWatchpoint(lldb::addr_t addr) override;
 
-  Error SetHardwareBreakpoint(lldb::addr_t addr, size_t size) override;
+  Status SetHardwareBreakpoint(lldb::addr_t addr, size_t size) override;
 
-  Error RemoveHardwareBreakpoint(lldb::addr_t addr) override;
+  Status RemoveHardwareBreakpoint(lldb::addr_t addr) override;
 
 private:
   // ---------------------------------------------------------------------
@@ -57,11 +57,11 @@
 
   /// Resumes the thread.  If @p signo is anything but
   /// LLDB_INVALID_SIGNAL_NUMBER, deliver that signal to the thread.
-  Error Resume(uint32_t signo);
+  Status Resume(uint32_t signo);
 
   /// Single steps the thread.  If @p signo is anything but
   /// LLDB_INVALID_SIGNAL_NUMBER, deliver that signal to the thread.
-  Error SingleStep(uint32_t signo);
+  Status SingleStep(uint32_t signo);
 
   void SetStoppedBySignal(uint32_t signo, const siginfo_t *info = nullptr);
 
@@ -86,7 +86,7 @@
 
   void SetExited();
 
-  Error RequestStop();
+  Status RequestStop();
 
   // ---------------------------------------------------------------------
   // Private interface