Support Boolean in interop varargs and function pointers invocation

Interop/Runtime/src/native/kotlin/kotlinx/cinterop/FunctionPointers.kt

@@ -70,6 +70,10 @@ private fun invokeImplUnitRet(ptr: COpaquePointer, vararg args: Any?): Unit = me
     callWithVarargs(ptr.rawValue, nativeNullPtr, FFI_TYPE_KIND_VOID, args, emptyArray(), memScope)
 }
 
+@ExportForCompiler
+private fun invokeImplBooleanRet(ptr: COpaquePointer, vararg args: Any?): Boolean =
+        invokeImplByteRet(ptr, *args).toBoolean()
+
 @ExportForCompiler
 private fun invokeImplByteRet(ptr: COpaquePointer, vararg args: Any?): Byte = memScoped {
     val resultBuffer = allocFfiReturnValueBuffer<ByteVar>(ByteVar)

Interop/Runtime/src/native/kotlin/kotlinx/cinterop/Varargs.kt

@@ -38,6 +38,8 @@ private tailrec fun convertArgument(
         FFI_TYPE_KIND_SINT64
     }
 
+    is Boolean -> convertArgument(argument.toByte(), isVariadic, location, additionalPlacement)
+
     is Byte -> if (isVariadic) {
         convertArgument(argument.toInt(), isVariadic, location, additionalPlacement)
     } else {