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.

2019/burton/prog.orig.c

@@ -0,0 +1 @@
+e,n,j,o,y;main(){for(++o;n=-~getchar();e+=11==n,y++)o=n>0xe^012>n&&'`'^n^65?!n:!o?++j:o;printf("%8d%8d%8d\n",e^n,j+=!o&&y,y);}