Allow test framework to use cores/esp8266/Arduino.h directly (#7377)

* Allow test framework to use cores/esp8266/Arduino.h directly
* fix wps debugging
* some more missing debug.h
* Hunt down debug.h and roll-back
  TODO: rename it to something else... it is an internal header
* Move abs+round checks to test/device/test_sw
* Restore macros for C code
* fixup! Move abs+round checks to test/device/test_sw
* Fix bad c/p, actually try round with ints
* tweak c macros per review
* fix gcc-10 missing cerrno include

tests/host/common/mock.h

@@ -30,6 +30,7 @@
 */
 
 #define CORE_MOCK 1
+#define MOCK "(mock) " // TODO: provide common logging API instead of adding this string everywhere?
 
 //
 
@@ -37,7 +38,6 @@
 #define ESP8266 1
 #define A0 0
 #define LED_BUILTIN 0
-#define F_CPU 80000000
 #define LWIP_OPEN_SRC
 #define TCP_MSS 536
 #define LWIP_FEATURES 1
@@ -54,19 +54,12 @@
 #define D7 7
 #define D8 8
 
-// include host's STL before any other include file
-// because core definition like max() is in the way
-
-#ifdef __cplusplus
-#include <vector>
-#endif
 #include <stddef.h>
 
-
 #ifdef __cplusplus
 extern "C" {
 #endif
-//#include <stdlib_noniso.h>
+// TODO: #include <stdlib_noniso.h> ?
 char* itoa (int val, char *s, int radix);
 char* ltoa (long val, char *s, int radix);
 #ifdef __cplusplus
@@ -91,9 +84,6 @@ uint32_t esp_get_cycle_count();
 
 #include <Arduino.h>
 
-//
-
-#include <stdlib.h>
 #define RANDOM_REG32 ((uint32_t)random())
 
 // net tweak