efi_selftest: unit test for variable services

Provide a unit test for variable services.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Signed-off-by: Alexander Graf <agraf@suse.de>
diff --git a/lib/efi_selftest/Makefile b/lib/efi_selftest/Makefile
index 80c4302..2b943bc 100644
--- a/lib/efi_selftest/Makefile
+++ b/lib/efi_selftest/Makefile
@@ -28,6 +28,7 @@
 efi_selftest_textoutput.o \
 efi_selftest_tpl.o \
 efi_selftest_util.o \
+efi_selftest_variables.o \
 efi_selftest_watchdog.o
 
 ifeq ($(CONFIG_BLK)$(CONFIG_PARTITIONS),yy)