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.

1994/dodsond1/.gitignore

@@ -1 +1,3 @@
 dodsond1
+dodsond1.orig
+prog.orig

1994/dodsond2/.gitignore

@@ -1 +1,3 @@
 dodsond2
+dodsond2.orig
+prog.orig

1994/horton/.gitignore

@@ -1,3 +1,5 @@
 gtface
 horton
 horton.alt
+horton.orig
+prog.orig

1994/imc/.gitignore

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

1994/ldb/.gitignore

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

1994/schnitzi/.gitignore

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

1994/shapiro/.gitignore

@@ -1,3 +1,5 @@
 shapiro
 shapiro_t1
 shapiro_t2.c
+shapiro.orig
+prog.orig

1994/smr/.gitignore

@@ -1,2 +1,4 @@
 smr
 smr.out
+smr.orig
+prog.orig

1994/tvr/.gitignore

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

1994/weisberg/.gitignore

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

1994/westley/.gitignore

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