Silence warnings for example/test dependencies (#1312)

diff --git a/examples/WORKSPACE.bazel b/examples/WORKSPACE.bazel
index 953fb6d..b2acd69 100644
--- a/examples/WORKSPACE.bazel
+++ b/examples/WORKSPACE.bazel
@@ -94,6 +94,13 @@
     name = "libc",
     srcs = glob(["src/**/*.rs"]),
     edition = "2015",
+    rustc_flags = [
+        # In most cases, warnings in 3rd party crates are not interesting as
+        # they're out of the control of consumers. The flag here silences
+        # warnings. For more details see:
+        # https://doc.rust-lang.org/rustc/lints/levels.html
+        "--cap-lints=allow",
+    ],
     visibility = ["//visibility:public"],
 )
 """
diff --git a/test/deps.bzl b/test/deps.bzl
index 58c09bc..96223dd 100644
--- a/test/deps.bzl
+++ b/test/deps.bzl
@@ -11,6 +11,13 @@
     name = "libc",
     srcs = glob(["src/**/*.rs"]),
     edition = "2015",
+    rustc_flags = [
+        # In most cases, warnings in 3rd party crates are not interesting as
+        # they're out of the control of consumers. The flag here silences
+        # warnings. For more details see:
+        # https://doc.rust-lang.org/rustc/lints/levels.html
+        "--cap-lints=allow",
+    ],
     visibility = ["//visibility:public"],
 )
 """