Basic: avoid truncation

`Swift.Int` is *NOT* `int` or `long`, it is `uintptr_t`.  Unfortunately,
we cannot include `stdint.h` here and thus cannot use `uintptr_t`.
Perhaps we should consider using `__swift_uintptr_t`.

For now, assume that we are always 64-bit and use `long long` and
`unsigned long long` which repairs the builds with non-LP64 targets.

Author: compnerd

include/swift/Basic/CBasicBridging.h

@@ -40,7 +40,7 @@ SWIFT_BEGIN_ASSUME_NONNULL
 
 typedef struct BridgedData {
   const char *_Nullable baseAddress;
-  unsigned long size;
+  size_t size;
 } BridgedData;
 
 void BridgedData_free(BridgedData data);