Don't log on EINTR.

	Change on 2015/01/07 by ctiller <ctiller@google.com>
-------------
Created by MOE: http://code.google.com/p/moe-java
MOE_MIGRATED_REVID=83469190

src/core/iomgr/pollset_multipoller_with_poll_posix.c

@@ -166,7 +166,9 @@ static int multipoll_with_poll_pollset_maybe_work(
 
   r = poll(h->pfds, h->pfd_count, timeout);
   if (r < 0) {
-    gpr_log(GPR_ERROR, "poll() failed: %s", strerror(errno));
+    if (errno != EINTR) {
+      gpr_log(GPR_ERROR, "poll() failed: %s", strerror(errno));
+    }
   } else if (r == 0) {
     /* do nothing */
   } else {

src/core/iomgr/pollset_posix.c

@@ -301,7 +301,9 @@ static int unary_poll_pollset_maybe_work(grpc_pollset *pollset,
 
   r = poll(pfd, GPR_ARRAY_SIZE(pfd), timeout);
   if (r < 0) {
-    gpr_log(GPR_ERROR, "poll() failed: %s", strerror(errno));
+    if (errno != EINTR) {
+      gpr_log(GPR_ERROR, "poll() failed: %s", strerror(errno));
+    }
   } else if (r == 0) {
     /* do nothing */
   } else {