toolchain: replace ifc interface compiler with xpcg

xpcg is used to generate xpc interfaces

toolchain/xpcg/type.c

@@ -0,0 +1,26 @@
+#include "type.h"
+
+#include <stdio.h>
+
+void type_print(const struct type *ty)
+{
+	switch (ty->ty_id) {
+	case TYPE_INT:
+		printf("int");
+		break;
+	case TYPE_STRING:
+		printf("string");
+		break;
+	case TYPE_SIZE:
+		printf("size");
+		break;
+	case TYPE_BUFFER:
+		printf("buffer");
+		break;
+	case TYPE_HANDLE:
+		printf("handle");
+		break;
+	default:
+		break;
+	}
+}