restore *.orig.c to each entry

Under each yyyy/dir there is a file of the form '*.orig.c'
containing the original source code, or as close as we can
get to the original source code.

1984/anonymous/anonymous.orig.c

@@ -0,0 +1,2 @@
+int i;main(){for(;i["]<i;++i){--i;}"];read('-'-'-',i+++"hell\
+o, world!\n",'/'/'/'));}read(j,i,p){write(j/p+p,i---j,i/i);}