Remove "EOF-newline" lexer hack

In preparation for an upcoming change
Makes for nicer error messages, complaining about EOF instead of newlines
The hack had to be kept for the lexer raw mode to avoid a bug;
see the relevant code comment for more info.

include/link/section.h

@@ -34,6 +34,7 @@ struct Patch {
 	uint32_t pcSectionID;
 	uint32_t pcOffset;
 	enum PatchType type;
+	bool isOperand;
 	int32_t rpnSize;
 	uint8_t *rpnExpression;