Mass .gitignore update for .orig.c files

Due to the fact we now have .orig.c files and thus the possibility of
winner.orig or prog.orig being built I have updated all the .gitignore
files so that these files ignored. This was done with the following
shell commands, for reference:

    for i in $(find 19* 200* 201[0123] -mindepth 2 -maxdepth 2 -name .gitignore) ; do echo $(dirname "$i"|sed -e 's,[0-9]\{4\}/,,g').orig >> "$i"; done
    for i in $(find 201[4-9] 2020 -mindepth 2 -maxdepth 2 -name .gitignore) ; do echo prog.orig >> "$i"; done

and the two commands is because it was only in 2014 that the winning
entries were renamed to prog so prog.orig is the correct glob.

1993/ant/.gitignore

@@ -2,3 +2,5 @@ ag
 ag.txt
 ant
 ant
+ant.orig
+prog.orig

1993/cmills/.gitignore

@@ -1 +1,3 @@
 cmills
+cmills.orig
+prog.orig

1993/dgibson/.gitignore

@@ -1,3 +1,5 @@
 data.name
 dgibson
 life.d 
+dgibson.orig
+prog.orig

1993/ejb/.gitignore

@@ -1 +1,3 @@
 ejb
+ejb.orig
+prog.orig

1993/jonth/.gitignore

@@ -1,2 +1,4 @@
 jonth
 jonth.tmp.c
+jonth.orig
+prog.orig

1993/leo/.gitignore

@@ -1,2 +1,4 @@
 leo
 mind
+leo.orig
+prog.orig

1993/lmfjyh/.gitignore

@@ -1,3 +1,5 @@
 "*
 lmfjyh
 lmfjyh.alt
+lmfjyh.orig
+prog.orig

1993/plummer/.gitignore

@@ -1,2 +1,4 @@
 plummer
 plummer.alt
+plummer.orig
+prog.orig

1993/rince/.gitignore

@@ -1,2 +1,4 @@
 jkb
 rince
+rince.orig
+prog.orig

1993/schnitzi/.gitignore

@@ -1 +1,3 @@
 schnitzi
+schnitzi.orig
+prog.orig

1993/vanb/.gitignore

@@ -1 +1,3 @@
 vanb
+vanb.orig
+prog.orig