Specify that skcms tests are "small"

This suppresses the warning that test execution time was too short.

Change-Id: I562fbfc07b8f273e250d7d7cfe7d8b4ac7cdded6
Reviewed-on: https://skia-review.googlesource.com/c/skcms/+/582342
Reviewed-by: Kevin Lubick <kjlubick@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
diff --git a/BUILD.bazel b/BUILD.bazel
index e2c566e..8fb6c0f 100644
--- a/BUILD.bazel
+++ b/BUILD.bazel
@@ -76,6 +76,7 @@
 
 cc_test(
     name = "tests",
+    size = "small",
     srcs = ["tests.c"],
     data = glob(["profiles/**"]),
     deps = [