system/core 64-bit cleanup.

This cleans up most of the size-related problems in system/core.
There are still a few changes needed for a clean 64-bit build,
but they look like they might require changes to things like the
fastboot protocol.

Change-Id: I1560425a289fa158e13e2e3173cc3e71976f92c0
diff --git a/logcat/logcat.cpp b/logcat/logcat.cpp
index d44c679..4c6139c 100644
--- a/logcat/logcat.cpp
+++ b/logcat/logcat.cpp
@@ -298,7 +298,7 @@
                     }
                     else if (entry->entry.len != ret - sizeof(struct logger_entry)) {
                         fprintf(stderr, "read: unexpected length. Expected %d, got %d\n",
-                                entry->entry.len, ret - sizeof(struct logger_entry));
+                                entry->entry.len, ret - (int) sizeof(struct logger_entry));
                         exit(EXIT_FAILURE);
                     }