unify host programs across targets

targets/c-host/c_host.c

@@ -0,0 +1,20 @@
+#include "../lib.h"
+
+#ifdef TARGET_LINUX
+#include <stdio.h>
+#endif
+
+void fail_start_trace(void) {}
+void fail_stop_trace(void) {}
+void fail_marker_positive(void) {}
+void fail_marker_negative(void) {}
+void fail_marker_detected(void) {}
+void print(const char *msg) { PRINT("[C]       %s", msg); }
+
+int wasm_module(void);
+
+MAIN {
+  int retval = wasm_module();
+  PRINT_SUCCESS("wasm_module returned %d.\n", retval);
+  RET(retval);
+}