efi_selftest: provide test for EFI_SIMPLE_TEXT_OUTPUT_PROTOCOL

The following services are tested:
OutputString, TestString, SetAttribute.

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 3e5c9a6..88b998b 100644
--- a/lib/efi_selftest/Makefile
+++ b/lib/efi_selftest/Makefile
@@ -17,6 +17,8 @@
 CFLAGS_REMOVE_efi_selftest_exitbootservices.o := $(CFLAGS_NON_EFI)
 CFLAGS_efi_selftest_snp.o := $(CFLAGS_EFI)
 CFLAGS_REMOVE_efi_selftest_snp.o := $(CFLAGS_NON_EFI)
+CFLAGS_efi_selftest_textoutput.o := $(CFLAGS_EFI)
+CFLAGS_REVMOE_efi_selftest_textoutput.o := $(CFLAGS_NON_EFI)
 CFLAGS_efi_selftest_tpl.o := $(CFLAGS_EFI)
 CFLAGS_REMOVE_efi_selftest_tpl.o := $(CFLAGS_NON_EFI)
 CFLAGS_efi_selftest_util.o := $(CFLAGS_EFI)
@@ -30,6 +32,7 @@
 efi_selftest_events.o \
 efi_selftest_exitbootservices.o \
 efi_selftest_snp.o \
+efi_selftest_textoutput.o \
 efi_selftest_tpl.o \
 efi_selftest_util.o \
 efi_selftest_watchdog.o