Remove unneded debug printing from FDUtils.

runtime/bin/fdutils_linux.cc

Index: runtime/bin/fdutils_linux.cc
diff --git a/runtime/bin/fdutils_linux.cc b/runtime/bin/fdutils_linux.cc
index a763c9b10eff8dc180e52ac6a5c59ea14777fc8d..3bb1ce1f0affcd11b80b6b1b3817b2b88c68bf73 100644
--- a/runtime/bin/fdutils_linux.cc
+++ b/runtime/bin/fdutils_linux.cc
@@ -20,12 +20,10 @@ bool FDUtils::SetCloseOnExec(intptr_t fd) {
   intptr_t status;
   status = TEMP_FAILURE_RETRY(fcntl(fd, F_GETFD));
   if (status < 0) {
-    perror("fcntl F_GETFD failed");
     return false;
   }
   status |= FD_CLOEXEC;
   if (TEMP_FAILURE_RETRY(fcntl(fd, F_SETFD, status)) < 0) {
-    perror("fcntl F_SETFD failed");
     return false;
   }
   return true;
@@ -36,12 +34,10 @@ static bool SetBlockingHelper(intptr_t fd, bool blocking) {
   intptr_t status;
   status = TEMP_FAILURE_RETRY(fcntl(fd, F_GETFL));
   if (status < 0) {
-    perror("fcntl F_GETFL failed");
     return false;
   }
   status = blocking ? (status & ~O_NONBLOCK) : (status | O_NONBLOCK);
   if (TEMP_FAILURE_RETRY(fcntl(fd, F_SETFL, status)) < 0) {
-    perror("fcntl F_SETFL failed");
     return false;
   }
   return true;
@@ -62,7 +58,6 @@ bool FDUtils::IsBlocking(intptr_t fd, bool* is_blocking) {
   intptr_t status;
   status = TEMP_FAILURE_RETRY(fcntl(fd, F_GETFL));
   if (status < 0) {
-    perror("fcntl F_GETFL failed");
     return false;
   }
   *is_blocking = (status & O_NONBLOCK) == 0;