move racing code fixed with POSIX semaphores to common directory

Author: Vladimir Kotal

race/Makefile

@@ -1,12 +1,15 @@
 # TODO: enable atomic-add once Travis has gcc 4.9 (issue #9)
-PROGS=fcntl-fixed-race race sem-fixed-race
+PROGS=fcntl-fixed-race race sem-fixed-race posix-sem-fixed-race
 
 all: $(PROGS)
 
 atomic-add: CSTD = c11
 atomic-add: atomic-add.o
 	$(CC) -o $@ $^ -lpthread
 
+posix-sem-fixed-race: posix-sem-fixed-race.o
+	$(CC) -o $@ $^ -lpthread
+
 fcntl-fixed-race: fcntl-fixed-race.o
 	$(CC) -o $@ $^
 

semaphores/posix-sem-fixed-race.c renamed to race/posix-sem-fixed-race.c

@@ -1,15 +1,11 @@
 PROGS=sem \
-      posix-sem-fixed-race \
       talking-heads
 
 all: $(PROGS)
 
 sem: sem.o
 	$(CC) -o $@ $^ -lpthread
 
-posix-sem-fixed-race: posix-sem-fixed-race.o
-	$(CC) -o $@ $^ -lpthread
-
 talking-heads: talking-heads.o
 	$(CC) -o $@ $^ -lpthread