Add a zcash-gtest binary to our build with a single tautological test.

.gitignore

@@ -4,6 +4,7 @@
 src/bitcoin
 src/zcashd
 src/zcash-cli
+src/zcash-gtest
 src/bitcoin-tx
 src/test/test_bitcoin
 src/qt/test/test_bitcoin-qt

src/Makefile.am

@@ -494,3 +494,4 @@ include Makefile.qttest.include
 endif
 
 include Makefile.zcash.include
+include Makefile.gtest.include

src/Makefile.gtest.include

@@ -0,0 +1,13 @@
+bin_PROGRAMS += zcash-gtest
+
+# tool for generating our public parameters
+zcash_gtest_SOURCES = \
+	gtest/main.cpp \
+	gtest/test_tautology.cpp
+
+zcash_gtest_LDADD = \
+  -lgtest \
+  $(LIBBITCOIN_UTIL)
+
+zcash-gtest_check: zcash-gtest FORCE
+	./zcash-gtest

src/gtest/main.cpp

@@ -0,0 +1,6 @@
+#include "gtest/gtest.h"
+
+int main(int argc, char **argv) {
+  testing::InitGoogleTest(&argc, argv);
+  return RUN_ALL_TESTS();
+}

src/gtest/test_tautology.cpp

@@ -0,0 +1,5 @@
+#include <gtest/gtest.h>
+
+TEST(tautologies, seven_eq_seven) {
+    ASSERT_EQ(7, 7);
+}