Move UNITY_PRINT_EOL to internals to allow access to it.

Unity fixture needs access to this macro to be consistent.
Add #ifndef wrapper for easier redefinition on systems that use "\r\n".

src/unity.c

@@ -11,7 +11,6 @@
 #define UNITY_IGNORE_AND_BAIL { Unity.CurrentTestIgnored = 1; longjmp(Unity.AbortFrame, 1); }
 /// return prematurely if we are already in failure or ignore state
 #define UNITY_SKIP_EXECUTION  { if ((Unity.CurrentTestFailed != 0) || (Unity.CurrentTestIgnored != 0)) {return;} }
-#define UNITY_PRINT_EOL       { UNITY_OUTPUT_CHAR('\n'); }
 
 struct _Unity Unity;