Fix missing includes in Arch & OS headers.

Author: btridev

include/remill/Arch/Name.h

@@ -90,14 +90,15 @@
 #  endif
 #endif
 
+#include <cstdint>
 #include <string_view>
 
 namespace llvm {
 class Triple;
 }  // namespace llvm
 namespace remill {
 
-enum ArchName : uint32_t {
+enum ArchName : std::uint32_t {
   kArchInvalid,
 
   kArchX86,

include/remill/OS/OS.h

@@ -16,6 +16,7 @@
 
 #pragma once
 
+#include <cstdint>
 #include <string>
 
 #ifndef REMILL_OS
@@ -58,7 +59,7 @@ class Triple;
 }  // namespace llvm
 namespace remill {
 
-enum OSName : uint32_t {
+enum OSName : std::uint32_t {
   kOSInvalid,
   kOSmacOS,
   kOSLinux,