Add support for uint8_t.

libc/include/stdint.h

@@ -30,6 +30,7 @@
 	typedef unsigned long long int uint64_t;
 	typedef unsigned short int uint16_t;
 	typedef unsigned int uint32_t;
+	typedef unsigned char uint8_t;
 #else
 	typedef signed long int ssize_t;
 	typedef unsigned long int size_t;