Add LMS implementation

Also an LM-OTS implementation as one is required for LMS.

Signed-off-by: Raef Coles <raef.coles@arm.com>
diff --git a/library/Makefile b/library/Makefile
index 9c3af3b..624773d 100644
--- a/library/Makefile
+++ b/library/Makefile
@@ -109,6 +109,8 @@
 	     hash_info.o \
 	     hkdf.o \
 	     hmac_drbg.o \
+	     lmots.o \
+	     lms.o \
 	     md.o \
 	     md5.o \
 	     memory_buffer_alloc.o \