Add tests for Errata management firmware interface.

Add tests to confirm that the em_version, em_features and
em_cpu_erratum_features calls conform to the errata abi spec.

Signed-off-by: Sona Mathew <SonaRebecca.Mathew@arm.com>
Change-Id: I8395026acc004a10d8c2c17ec689f4e0752143d8
diff --git a/tftf/framework/framework.mk b/tftf/framework/framework.mk
index a2d6926..188e9af 100644
--- a/tftf/framework/framework.mk
+++ b/tftf/framework/framework.mk
@@ -64,6 +64,7 @@
 	lib/smc/${ARCH}/asm_smc.S					\
 	lib/smc/${ARCH}/smc.c						\
 	lib/trng/trng.c							\
+        lib/errata_abi/errata_abi.c                                     \
 	lib/trusted_os/trusted_os.c					\
 	lib/utils/mp_printf.c						\
 	lib/utils/uuid.c						\