misc: Fix some includes

Fix some missing and extra includes around the codebase.

Change-Id: Ibf314b43a966943a8096958f68382e1e245f29e3
Signed-off-by: Daniel R. Carvalho <odanrc@yahoo.com.br>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/38738
Reviewed-by: Bobby R. Bruce <bbruce@ucdavis.edu>
Maintainer: Bobby R. Bruce <bbruce@ucdavis.edu>
Tested-by: kokoro <noreply+kokoro@google.com>

src/base/trace.cc

@@ -35,10 +35,8 @@
 #include <fstream>
 #include <iostream>
 #include <sstream>
-#include <string>
 
 #include "base/atomicio.hh"
-#include "base/debug.hh"
 #include "base/logging.hh"
 #include "base/output.hh"
 #include "base/str.hh"

src/base/trace.hh

@@ -32,6 +32,7 @@
 #ifndef __BASE_TRACE_HH__
 #define __BASE_TRACE_HH__
 
+#include <ostream>
 #include <string>
 #include <sstream>