Rename MG_ARCH_NEWLIB -> MG_ARCH_ARM_GCC

src/arch_armgcc.h

@@ -0,0 +1,23 @@
+#pragma once
+
+#if MG_ARCH == MG_ARCH_ARMGCC
+#define _POSIX_TIMERS
+
+#include <ctype.h>
+#include <errno.h>
+#include <stdarg.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/stat.h>
+#include <sys/time.h>
+#include <sys/types.h>
+#include <time.h>
+#include <unistd.h>
+
+#define MG_PATH_MAX 100
+#define MG_ENABLE_SOCKET 0
+#define MG_ENABLE_DIRLIST 0
+
+#endif