Import from OpenBSD a patch which eliminates the link with -ly or -ly

patch by ibara@

Obtained from:	OpenBSD

usr.bin/m4/Makefile

@@ -8,7 +8,7 @@
 
 PROG=	m4
 CFLAGS+=-DEXTENDED -I${.CURDIR} -I${SRCTOP}/lib/libopenbsd
-LIBADD=	y l m openbsd
+LIBADD=	m openbsd
 
 NO_WMISSING_VARIABLE_DECLARATIONS=
 

usr.bin/m4/tokenizer.l

@@ -43,6 +43,8 @@ oct	0[0-7]*
 dec	[1-9][0-9]*
 radix	0[rR][0-9]+:[0-9a-zA-Z]+
 
+%option noyywrap
+
 %%
 {ws}			{/* just skip it */}
 {hex}|{oct}|{dec}	{ yylval = number(); return(NUMBER); }