[Runtime] Fix AbsoluteFuncPtr to allow template parameter inference

`AbsoluteFunctionPointer` was not able to be passed to a function that
takes a `TargetCompactFunctionPointer` because the template parameters
`Nullable` and `Offset` were not parameterized by `AbsoluteFunctionPointer`.

29c350e introduced the first such
function `InProcessReaderWriter::resolveFunctionPointer` and it revealed
this issue.

Author: kateinoigakukun

include/swift/ABI/CompactFunctionPointer.h

@@ -26,7 +26,7 @@ namespace swift {
 /// integer.
 /// As a trade-off compared to relative pointers, this has load-time overhead in PIC
 /// and is only available on 32-bit targets.
-template <typename T>
+template <typename T, bool Nullable = false, typename Offset = int32_t>
 class AbsoluteFunctionPointer {
   T *Pointer;
   static_assert(sizeof(T *) == sizeof(int32_t),

include/swift/ABI/TargetLayout.h

@@ -104,7 +104,7 @@ struct InProcess {
 
   template <typename T, bool Nullable = true, typename Offset = int32_t>
 #if SWIFT_COMPACT_ABSOLUTE_FUNCTION_POINTER
-  using CompactFunctionPointer = AbsoluteFunctionPointer<T>;
+  using CompactFunctionPointer = AbsoluteFunctionPointer<T, Nullable, Offset>;
 #else
   using CompactFunctionPointer =
       swift::RelativeDirectPointer<T, Nullable, Offset>;