Update build.json, fix opensource build.
	Change on 2014/12/20 by ctiller <ctiller@google.com>
-------------
Created by MOE: http://code.google.com/p/moe-java
MOE_MIGRATED_REVID=82580775
diff --git a/build.json b/build.json
index 2fe11d8..3d961dd 100644
--- a/build.json
+++ b/build.json
@@ -115,6 +115,8 @@
         "src/core/httpcli/httpcli.c",
         "src/core/httpcli/httpcli_security_context.c",
         "src/core/httpcli/parser.c",
+        "src/core/iomgr/alarm.c",
+        "src/core/iomgr/alarm_heap.c",
         "src/core/iomgr/endpoint.c",
         "src/core/iomgr/endpoint_pair_posix.c",
         "src/core/iomgr/iomgr_libevent.c",
@@ -211,6 +213,8 @@
         "src/core/httpcli/httpcli_security_context.h",
         "src/core/httpcli/parser.h",
         "src/core/iomgr/alarm.h",
+        "src/core/iomgr/alarm_heap.h",
+        "src/core/iomgr/alarm_internal.h",
         "src/core/iomgr/endpoint.h",
         "src/core/iomgr/endpoint_pair.h",
         "src/core/iomgr/iomgr_completion_queue_interface.h",