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.

1998/bas2/bas2.orig.c

@@ -0,0 +1,3 @@
+#include <stdio.h>
+int O,o,i;char*I="";main(l){O&=l&1?*I:~*I,*I++||(l=2*getchar(),i+=O>8
+?o:O?0:o+1,o=O>9,O=-1,I="t8B~pq`",l>0)?main(l/2):printf("%d\n",--i);}