stdint types all the way!

Change-Id: I4e4ef3a2002fc59ebd9097087f150eaf3f2a7e08
diff --git a/runtime/elf_file.h b/runtime/elf_file.h
index ea6538b..a7f3056 100644
--- a/runtime/elf_file.h
+++ b/runtime/elf_file.h
@@ -40,13 +40,13 @@
   // Load segments into memory based on PT_LOAD program headers
   bool Load(bool executable, std::string* error_msg);
 
-  const byte* FindDynamicSymbolAddress(const std::string& symbol_name) const;
+  const uint8_t* FindDynamicSymbolAddress(const std::string& symbol_name) const;
 
   size_t Size() const;
 
-  byte* Begin() const;
+  uint8_t* Begin() const;
 
-  byte* End() const;
+  uint8_t* End() const;
 
   const File& GetFile() const;