add .clang-format

Change-Id: I7c2a527b4751a560703a61fcbe9638b150546af5
Signed-off-by: Patrick Venture <venture@google.com>
diff --git a/test/sample_unittest.cpp b/test/sample_unittest.cpp
index 2a27279..e574173 100644
--- a/test/sample_unittest.cpp
+++ b/test/sample_unittest.cpp
@@ -1,6 +1,8 @@
 #include "sample.h"
+
 #include <gtest/gtest.h>
 
-TEST(FactorialTest, Zero) {
+TEST(FactorialTest, Zero)
+{
     EXPECT_EQ(1, Factorial(0));
 }