update_engine: Use integer types from stdint.h

This CL replaces the deprecated int* and uint* types from
'base/basictypes.h' with the int*_t and uint*_t types from 'stdint.h'.

BUG=chromium:401356
TEST=`FEATURES=test emerge-$BOARD update_engine`

Change-Id: Id283545bd2320e33117099089419ece316881a6d
Reviewed-on: https://chromium-review.googlesource.com/211383
Commit-Queue: Ben Chan <benchan@chromium.org>
Tested-by: Ben Chan <benchan@chromium.org>
Reviewed-by: Alex Deymo <deymo@chromium.org>
diff --git a/update_manager/boxed_value.cc b/update_manager/boxed_value.cc
index 8200879..56b42b8 100644
--- a/update_manager/boxed_value.cc
+++ b/update_manager/boxed_value.cc
@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+#include <stdint.h>
+
 #include <set>
 #include <string>
 
@@ -49,7 +51,7 @@
 string BoxedValue::ValuePrinter<uint64_t>(const void *value) {
   const uint64_t* val =
     reinterpret_cast<const uint64_t*>(value);
-  return base::Uint64ToString(static_cast<uint64>(*val));
+  return base::Uint64ToString(static_cast<uint64_t>(*val));
 }
 
 template<>