games/punchy: unbreak build with clang 16 on aarch64

In file included from cargo-crates/v8-0.47.1/v8/src/compiler/backend/instruction-selector.cc:5:
In file included from cargo-crates/v8-0.47.1/v8/src/compiler/backend/instruction-selector.h:12:
In file included from cargo-crates/v8-0.47.1/v8/src/compiler/backend/instruction-scheduler.h:10:
In file included from cargo-crates/v8-0.47.1/v8/src/compiler/backend/instruction.h:13:
In file included from cargo-crates/v8-0.47.1/v8/src/codegen/external-reference.h:9:
In file included from cargo-crates/v8-0.47.1/v8/src/runtime/runtime.h:11:
cargo-crates/v8-0.47.1/v8/src/base/bit-field.h:43:29: error: integer value 31 is outside the valid range of values [0, 15] for the enumeration type 'AddressingMode' [-Wenum-constexpr-conversion]
  static constexpr T kMax = static_cast<T>(kNumValues - 1);
                            ^

Reported by:	pkg-fallout

games/punchy/Makefile

@@ -24,10 +24,11 @@ PORTDATA=	*
 
 # Bundled v8
 BUILD_DEPENDS+=	gn:devel/gn
-USES+=		ninja:build python:build
+USES+=		compiler ninja:build python:build
 BINARY_ALIAS+=	python=${PYTHON_CMD}
 CARGO_ENV+=	V8_FROM_SOURCE=1 CLANG_BASE_PATH="/usr" GN_ARGS='${GN_ARGS}'
 GN_ARGS+=	use_custom_libcxx=false
+CXXFLAGS+=	${${ARCH} == aarch64 && ${COMPILER_TYPE} == clang && ${COMPILER_VERSION} >= 160:?-Wno-enum-constexpr-conversion:}
 
 post-patch:
 # Search assets under PREFIX instead of current directory