Fix 1990/stig/Makefile for linux

The paths in the shell command did not have './' to it and this no
longer works. I believe it did work in macOS but I no longer remember
for sure.

1990/stig/Makefile

@@ -127,7 +127,7 @@ all: data ${TARGET}
 	supernova deep_magic magic charon pluto
 
 ${PROG}: ${PROG}.c
-	@echo "source stig.sh ; source stig.c" | ${SH}
+	@echo "source ./stig.sh ; source ./stig.c" | ${SH}
 
 # alternative executable
 #

thanks-for-fixes.md

@@ -426,6 +426,11 @@ Yusuke pointed out that `atof` nowadays needs `#include <stdlib.h>` which was
 used in order to get this to work initially (prior to this output was there but
 incomplete).
 
+## [1990/stig](1990/stig/stig.c) ([README.md](1990/stig/README.md))
+
+Cody fixed the paths in the Makefile so that this would build in linux (it
+worked fine in macOS).
+
 
 ## [1990/westley](1990/westley/westley.c) ([README.md](1990/westley/README.md]))