esp8266: Rename "machine" module implementation to use contemporary naming.
Previously they used historical "pyb" affix causing confusion and
inconsistency (there's no "pyb" module in modern ports; but people
took esp8266 port as an example, and "pyb" naming kept proliferating,
while other people complained that source structure is not clear).
diff --git a/esp8266/modpyb.c b/esp8266/modpyb.c
index ba53e71..9fe8039 100644
--- a/esp8266/modpyb.c
+++ b/esp8266/modpyb.c
@@ -28,12 +28,12 @@
#include "py/gc.h"
#include "gccollect.h"
-#include "modpyb.h"
+#include "modmachine.h"
// The pyb module no longer exists since all functionality now appears
// elsewhere, in more standard places (eg time, machine modules). The
// only remaining function is pyb.info() which has been moved to the
-// esp module, pending deletion/renaming/moving elsewher.
+// esp module, pending deletion/renaming/moving elsewhere.
STATIC mp_obj_t pyb_info(mp_uint_t n_args, const mp_obj_t *args) {
// print info about memory