win: Make reading CrashpadInfo work across bitness

util/win/process_structs.h

Index: util/win/process_structs.h
diff --git a/util/win/process_structs.h b/util/win/process_structs.h
index 79f6515259c4bb13c29564749bd329e2f3bfcf6e..d6080156ad102852203fd64cb2fe4b3e9f8c615f 100644
--- a/util/win/process_structs.h
+++ b/util/win/process_structs.h
@@ -25,12 +25,14 @@ namespace internal {
 struct Traits32 {
   using Pad = DWORD;
   using UnsignedIntegral = DWORD;
+  using Byte = BYTE;
   using Pointer = DWORD;
 };
 
 struct Traits64 {
   using Pad = DWORD64;
   using UnsignedIntegral = DWORD64;
+  using Byte = BYTE;
   using Pointer = DWORD64;
 };