Hide 'format not a string literal' error in examples

Change-Id: Ieb3d24438f1c5ec46d3a1de049e63c65ae2ed312

examples/BUILD

diff --git a/examples/BUILD b/examples/BUILD
index 04bf5c6..7bacf22 100644
--- a/examples/BUILD
+++ b/examples/BUILD
@@ -31,6 +31,8 @@
 EXAMPLE_COPTS = [
     # Needed to silence GFlags complaints.
     "-Wno-sign-compare",
+    # Needed to put fscanf in a function.
+    "-Wno-format-nonliteral",
 ]
 
 EXAMPLE_DEPS = [