tests: Add lib/memmove-test test case

Signed-off-by: Jakub Czapiga <jacz@semihalf.com>
Change-Id: Ic9b68eb0fa85bbc3f66d57cdcb329073b26bea57
Reviewed-on: https://review.coreboot.org/c/coreboot/+/50902
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Paul Fagerburg <pfagerburg@chromium.org>

tests/lib/Makefile.inc

@@ -19,6 +19,7 @@ tests-y += memcmp-test
 tests-y += memchr-test
 tests-y += memcpy-test
 tests-y += malloc-test
+tests-y += memmove-test
 
 string-test-srcs += tests/lib/string-test.c
 string-test-srcs += src/lib/string.c
@@ -95,3 +96,5 @@ memcpy-test-srcs += tests/lib/memcpy-test.c
 malloc-test-srcs += tests/lib/malloc-test.c
 malloc-test-srcs += tests/stubs/console.c
 
+memmove-test-srcs += tests/lib/memmove-test.c
+