Avoid duplicate definitions of ROUND_UP_TO_ALIGNMENT_SIZE() macro.
diff --git a/BUILD b/BUILD
index dca9c87..8ce67e6 100644
--- a/BUILD
+++ b/BUILD
@@ -540,6 +540,7 @@
         "src/core/lib/profiling/stap_timers.cc",
     ],
     hdrs = [
+        "src/core/lib/gpr/alloc.h",
         "src/core/lib/gpr/arena.h",
         "src/core/lib/gpr/env.h",
         "src/core/lib/gpr/host_port.h",