py: Move to guarded includes for compile.h and related headers.

py/compile.h

@@ -23,6 +23,12 @@
  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  * THE SOFTWARE.
  */
+#ifndef __MICROPY_INCLUDED_PY_COMPILE_H__
+#define __MICROPY_INCLUDED_PY_COMPILE_H__
+
+#include "py/lexer.h"
+#include "py/parse.h"
+#include "py/emitglue.h"
 
 // These must fit in 8 bits; see scope.h
 enum {
@@ -38,3 +44,5 @@ mp_obj_t mp_compile(mp_parse_node_t pn, qstr source_file, uint emit_opt, bool is
 
 // this is implemented in runtime.c
 mp_obj_t mp_parse_compile_execute(mp_lexer_t *lex, mp_parse_input_kind_t parse_input_kind, mp_obj_dict_t *globals, mp_obj_dict_t *locals);
+
+#endif // __MICROPY_INCLUDED_PY_COMPILE_H__