efi_selftest: test for graphics output protocol

Supply a test for the graphics output protocol.

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 acd184d..1851c17 100644
--- a/lib/efi_selftest/Makefile
+++ b/lib/efi_selftest/Makefile
@@ -15,6 +15,8 @@
 CFLAGS_REMOVE_efi_selftest_events.o := $(CFLAGS_NON_EFI)
 CFLAGS_efi_selftest_exitbootservices.o := $(CFLAGS_EFI)
 CFLAGS_REMOVE_efi_selftest_exitbootservices.o := $(CFLAGS_NON_EFI)
+CFLAGS_efi_selftest_gop.o := $(CFLAGS_EFI)
+CFLAGS_REMOVE_efi_selftest_gop.o := $(CFLAGS_NON_EFI)
 CFLAGS_efi_selftest_manageprotocols.o := $(CFLAGS_EFI)
 CFLAGS_REMOVE_efi_selftest_manageprotocols.o := $(CFLAGS_NON_EFI)
 CFLAGS_efi_selftest_snp.o := $(CFLAGS_EFI)
@@ -33,6 +35,7 @@
 efi_selftest_console.o \
 efi_selftest_events.o \
 efi_selftest_exitbootservices.o \
+efi_selftest_gop.o \
 efi_selftest_manageprotocols.o \
 efi_selftest_snp.o \
 efi_selftest_textoutput.o \