lib: uuid: introduce testcase for uuid_str_to_le_bin

provide a test case

Signed-off-by: Abdellatif El Khlifi <abdellatif.elkhlifi@arm.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Cc: Tom Rini <trini@konsulko.com>
diff --git a/test/lib/Makefile b/test/lib/Makefile
index e0bd9e0..e75a263 100644
--- a/test/lib/Makefile
+++ b/test/lib/Makefile
@@ -22,6 +22,7 @@
 obj-$(CONFIG_GETOPT) += getopt.o
 obj-$(CONFIG_CRC8) += test_crc8.o
 obj-$(CONFIG_UT_LIB_CRYPT) += test_crypt.o
+obj-$(CONFIG_LIB_UUID) += uuid.o
 else
 obj-$(CONFIG_SANDBOX) += kconfig_spl.o
 endif