sync years.html with the current fileset

1992/adrian/Makefile

@@ -240,6 +240,8 @@ clean:
 
 clobber: clean
 	${RM} -f ${TARGET} ${ALT_TARGET}
+	${RM} -f adbasename adbasename.c adecho adecho.c adgrep adhead
+	${RM} -f adhead.c adrian adsleep adsleep.c adwc adwc.c
 	@-if [ -e sandwich ]; then \
 	    ${RM} -f sandwich; \
 	    echo 'ate sandwich'; \

1992/ant/Makefile

@@ -220,6 +220,7 @@ clean:
 
 clobber: clean
 	${RM} -f ${TARGET} ${ALT_TARGET}
+	${RM} -f am am.safe
 	@-if [ -e sandwich ]; then \
 	    ${RM} -f sandwich; \
 	    echo 'ate sandwich'; \

2013/birken/.gitignore

@@ -1,3 +1 @@
 birken
-examples/
-images/

2020/burton/Makefile

@@ -237,6 +237,7 @@ clean:
 
 clobber: clean
 	${RM} -f ${TARGET} ${ALT_TARGET}
+	${RM} -f ${PROG}_be ${PROG}_le
 	@-if [ -e sandwich ]; then \
 	    ${RM} -f sandwich; \
 	    echo 'ate sandwich'; \

2020/endoh3/Makefile

@@ -223,6 +223,7 @@ clean:
 
 clobber: clean
 	${RM} -f ${TARGET} ${ALT_TARGET}
+	${RM} -f clock.c clock
 	@-if [ -e sandwich ]; then \
 	    ${RM} -f sandwich; \
 	    echo 'ate sandwich'; \