asm: add newlines to the ends of yaccprt[134].y

Signed-off-by: Vegard Nossum <vegard.nossum@gmail.com>

src/asm/gameboy/yaccprt4.y

@@ -495,4 +495,4 @@ reg_rr			:	T_MODE_BC_IND		{ $$ = REG_BC_IND }
 				|	T_MODE_HL_INDDEC	{ $$ = REG_HL_INDDEC }
 ;
 
-%%
+%%

src/asm/yaccprt1.y

@@ -429,4 +429,4 @@ void	out_ZPByte( struct Expression *expr )
 %token	T_POP_PUSHS
 %token	T_POP_POPO
 %token	T_POP_PUSHO
-%token	T_POP_OPT
+%token	T_POP_OPT

src/asm/yaccprt3.y

@@ -529,4 +529,4 @@ string			:	T_STRING
 					{ strcpy($$,$3); strupr($$); }
 				|	T_OP_STRLWR '(' string ')'
 					{ strcpy($$,$3); strlwr($$); }
-;
+;