tests: Add lib/memcmp-test test case

Signed-off-by: Jakub Czapiga <jacz@semihalf.com>
Change-Id: Ib63123a36179127af4e3720ed01ca2611daa607e
Reviewed-on: https://review.coreboot.org/c/coreboot/+/50785
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Paul Fagerburg <pfagerburg@chromium.org>
diff --git a/tests/lib/Makefile.inc b/tests/lib/Makefile.inc
index 23d8d34..9f4a6ca 100644
--- a/tests/lib/Makefile.inc
+++ b/tests/lib/Makefile.inc
@@ -15,6 +15,7 @@
 tests-y += region_file-test
 tests-y += stack-test
 tests-y += memset-test
+tests-y += memcmp-test
 
 string-test-srcs += tests/lib/string-test.c
 string-test-srcs += src/lib/string.c
@@ -80,3 +81,6 @@
 
 memset-test-srcs += tests/lib/memset-test.c
 memset-test-srcs += src/lib/memset.c
+
+memcmp-test-srcs += tests/lib/memcmp-test.c
+