message: fix(runtime-c-api) Write macros at column 0.
diff: @@ -15,6 +15,7 @@ fn main() {
  const WASMER_PRE_HEADER: &str = r#"
  #if !defined(WASMER_H_MACROS)
  #define WASMER_H_MACROS
  +
  #if defined(MSVC)
  #if defined(_M_AMD64)
  #define ARCH_X86_64
  @@ -26,7 +27,8 @@ fn main() {
  #define ARCH_X86_64
  #endif
  #endif
  -#endif
  +
  +#endif // WASMER_H_MACROS
  "#;
  // Generate the C bindings in the `OUT_DIR`.
  out_wasmer_header_file.set_extension("h");
  