feat: added cross compiler and moved headers to include dir

include/libc/libc.h

@@ -0,0 +1,25 @@
+/*
+ * libc.h
+ *
+ *  Created on: Oct 11, 2018
+ *      Author: rick
+ */
+
+#ifndef KERNEL_LIBC_LIBC_H_
+#define KERNEL_LIBC_LIBC_H_
+
+#include <types.h>
+
+int memcpy(uint8_t *dst, const uint8_t *src, int amount);
+
+int memset(uint8_t *dst, char data, int amount);
+
+char *itoa(int value, char *buffer, int base);
+
+int abs(int val);
+
+int maxi(int a, int b);
+
+int mini(int a, int b);
+
+#endif /* KERNEL_LIBC_LIBC_H_ */