regressions/build: fix build.

There was a silly typo and circular dependency introduced in the migration.
Thanks to Sarah Edkins <sedkins@backtrace.io> for letting me borrow her laptop
to investigate.

regressions/ck_ec/validate/Makefile

@@ -12,13 +12,13 @@ libfuzzer_fuzz_cflags = -DUSE_LIBFUZZER -fsanitize=fuzzer,memory,undefined
 FUZZ_CFLAGS += ${${FUZZER}_fuzz_cflags}
 
 OBJECTS = ck_ec_smoke_test 		\
-	prop_test_slow_wakeup		\
 	prop_test_timeutil_add		\
 	prop_test_timeutil_add_ns	\
 	prop_test_timeutil_cmp		\
 	prop_test_timeutil_scale	\
-	prop_test_value 		\
-	prop_test_wakeup
+	prop_test_value 			\
+	prop_test_wakeup			\
+	prop_test_slow_wakeup
 
 all: $(OBJECTS)
 
@@ -45,22 +45,22 @@ quickfuzz: all
 ck_ec_smoke_test: ../../../src/ck_ec.c ck_ec_smoke_test.c ../../../src/ck_ec_timeutil.h ../../../include/ck_ec.h
 	$(CC) $(CFLAGS) -std=gnu11 ../../../src/ck_ec.c -o ck_ec_smoke_test ck_ec_smoke_test.c
 
-prop_test_slow_wakeup.c: ../../../src/ck_ec.c prop_test_wakeup.c ../../../src/ck_ec_timeutil.h ../../../include/ck_ec.h fuzz_harness.h
+prop_test_slow_wakeup: ../../../src/ck_ec.c prop_test_slow_wakeup.c ../../../src/ck_ec_timeutil.h ../../../include/ck_ec.h fuzz_harness.h
 	$(CC) $(CFLAGS) $(FUZZ_CFLAGS) ../../../src/ck_ec.c -o prop_test_slow_wakeup prop_test_slow_wakeup.c
 
-prop_test_timeutil_add: ../../../src/ck_ec.c prop_test_wakeup.c ../../../src/ck_ec_timeutil.h ../../../include/ck_ec.h fuzz_harness.h
+prop_test_timeutil_add: ../../../src/ck_ec.c prop_test_timeutil_add.c ../../../src/ck_ec_timeutil.h ../../../include/ck_ec.h fuzz_harness.h
 	$(CC) $(CFLAGS) $(FUZZ_CFLAGS) ../../../src/ck_ec.c -o prop_test_timeutil_add prop_test_timeutil_add.c
 
-prop_test_timeutil_add_ns: ../../../src/ck_ec.c prop_test_wakeup.c ../../../src/ck_ec_timeutil.h ../../../include/ck_ec.h fuzz_harness.h
+prop_test_timeutil_add_ns: ../../../src/ck_ec.c prop_test_timeutil_add_ns.c ../../../src/ck_ec_timeutil.h ../../../include/ck_ec.h fuzz_harness.h
 	$(CC) $(CFLAGS) $(FUZZ_CFLAGS) ../../../src/ck_ec.c -o prop_test_timeutil_add_ns prop_test_timeutil_add_ns.c
 
-prop_test_timeutil_cmp: ../../../src/ck_ec.c prop_test_wakeup.c ../../../src/ck_ec_timeutil.h ../../../include/ck_ec.h fuzz_harness.h
+prop_test_timeutil_cmp: ../../../src/ck_ec.c prop_test_timeutil_cmp.c ../../../src/ck_ec_timeutil.h ../../../include/ck_ec.h fuzz_harness.h
 	$(CC) $(CFLAGS) $(FUZZ_CFLAGS) ../../../src/ck_ec.c -o prop_test_timeutil_cmp prop_test_timeutil_cmp.c
 
-prop_test_timeutil_scale: ../../../src/ck_ec.c prop_test_wakeup.c ../../../src/ck_ec_timeutil.h ../../../include/ck_ec.h fuzz_harness.h
+prop_test_timeutil_scale: ../../../src/ck_ec.c prop_test_timeutil_scale.c ../../../src/ck_ec_timeutil.h ../../../include/ck_ec.h fuzz_harness.h
 	$(CC) $(CFLAGS) $(FUZZ_CFLAGS) ../../../src/ck_ec.c -o prop_test_timeutil_scale prop_test_timeutil_scale.c
 
-prop_test_value: ../../../src/ck_ec.c prop_test_wakeup.c ../../../src/ck_ec_timeutil.h ../../../include/ck_ec.h fuzz_harness.h
+prop_test_value: ../../../src/ck_ec.c prop_test_value.c ../../../src/ck_ec_timeutil.h ../../../include/ck_ec.h fuzz_harness.h
 	$(CC) $(CFLAGS) $(FUZZ_CFLAGS) ../../../src/ck_ec.c -o prop_test_value prop_test_value.c
 
 prop_test_wakeup: ../../../src/ck_ec.c prop_test_wakeup.c ../../../src/ck_ec_timeutil.h ../../../include/ck_ec.h fuzz_harness.h