test: convert vtable to gtest

Change-Id: Ic54957df1c8d08c5461b262628fd1cc5c27217d7
Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
diff --git a/test/Makefile.am b/test/Makefile.am
index bc1ede9..500f7c5 100644
--- a/test/Makefile.am
+++ b/test/Makefile.am
@@ -1,6 +1,6 @@
 if WANT_LIBSDBUSPLUS
 
-AM_CPPFLAGS = -I$(top_srcdir)
+AM_CPPFLAGS = -I$(top_srcdir) $(GTEST_CPPFLAGS)
 check_PROGRAMS =
 
 TESTS = $(check_PROGRAMS)
@@ -33,5 +33,6 @@
 
 check_PROGRAMS += vtable_vtable
 vtable_vtable_SOURCES = vtable/vtable.cpp vtable/vtable_c.c
+vtable_vtable_LDFLAGS = -lgtest -lgtest_main
 
 endif