kunit: test: fix Makefile CONFIG_ for death test

In c911639be3c420546384b906e8704dfe281c9af3 (kunit: test: move death
test to its own KUnit config), I accidentally included the new death
test into the old CONFIG_TEST_TEST config instead of the new
CONFIG_TEST_DEATH_TEST config created for it; this fixes that.

Signed-off-by: Brendan Higgins <brendanhiggins@google.com>
Google-Bug-Id: 116313114
Squash: c911639be3c420546384b906e8704dfe281c9af3
Change-Id: I1a9354b87eab64dba72385a8b16b560e160d3c2e
diff --git a/test/Makefile b/test/Makefile
index 4a7a2c9..4d69804 100644
--- a/test/Makefile
+++ b/test/Makefile
@@ -3,5 +3,5 @@
 obj-$(CONFIG_TEST_TEST)		+= \
   test-mock.o mock-macro-test.o mock-test.o string-stream-test.o \
   test-stream-test.o
-obj-$(CONFIG_TEST_TEST)		+= test-death-test.o
+obj-$(CONFIG_TEST_DEATH_TEST)	+= test-death-test.o
 obj-$(CONFIG_EXAMPLE_TEST)	+= example-test.o