Replace byacc with oyacc

byacc has an awk script to generate .c files

oyacc seems to work fine instead

steps/oyacc-6.6/mk/main.mk

@@ -0,0 +1,36 @@
+# SPDX-FileCopyrightText: 2019 Brian Callahan <bcallah@openbsd.org>
+# SPDX-FileCopyrightText: 2025 fosslinux <fosslinux@aussies.space>
+#
+# SPDX-License-Identifier: CC0-1.0
+
+CC =		tcc
+CFLAGS =	-D__dead= -D__unused=
+LDFLAGS =   -static
+LIBS =      -lgetopt
+PREFIX =	/usr
+BINDIR =    /usr/bin
+MANDIR =	/usr/share/man
+PROG =		yacc
+
+OBJS =	closure.o error.o lalr.o lr0.o main.o mkpar.o output.o reader.o \
+	skeleton.o symtab.o verbose.o warshall.o portable.o
+
+all: ${PROG}
+
+${PROG}: ${OBJS}
+	${CC} ${LDFLAGS} -o ${PROG} ${OBJS} ${LIBS}
+
+install: all
+	install -d ${DESTDIR}${BINDIR}
+	install -d ${DESTDIR}${MANDIR}
+	install -m 555 ${PROG} ${DESTDIR}${BINDIR}
+	install -m 555 yyfix.sh ${DESTDIR}${BINDIR}/yyfix
+
+test:
+	@echo "No tests"
+
+clean:
+	rm -f ${PROG} ${OBJS}
+
+distclean: clean
+	rm -f Makefile config.h