Minor fixes in 1985

The README.md referred to Obfuscated C Code Contest but at this point it
was the International Obfuscated C Code Contest.

Add ALT_{OBJ,TARGET} to 1985/shapiro/Makefile as the alt source code
file was there.

1985/shapiro/Makefile

@@ -167,8 +167,8 @@ OBJ= ${PROG}.o
 DATA=
 TARGET= ${PROG}
 #
-ALT_OBJ=
-ALT_TARGET=
+ALT_OBJ= ${PROG}.alt.o
+ALT_TARGET= ${PROG}.alt
 
 
 #################