Fixes some memory leaks in //runtime/bin

runtime/bin/crypto_linux.cc

Index: runtime/bin/crypto_linux.cc
diff --git a/runtime/bin/crypto_linux.cc b/runtime/bin/crypto_linux.cc
index cf3062d0318a1aa1072f605769e4ce1e8e04276b..875ec8e11e5f82c21b218bb6c5cf3fc0c1a8290f 100644
--- a/runtime/bin/crypto_linux.cc
+++ b/runtime/bin/crypto_linux.cc
@@ -12,7 +12,6 @@
 #include "bin/crypto.h"
 #include "platform/signal_blocker.h"
 
-
 namespace dart {
 namespace bin {
 
@@ -20,7 +19,9 @@ bool Crypto::GetRandomBytes(intptr_t count, uint8_t* buffer) {
   ThreadSignalBlocker signal_blocker(SIGPROF);
   intptr_t fd = TEMP_FAILURE_RETRY_NO_SIGNAL_BLOCKER(
       open("/dev/urandom", O_RDONLY));
-  if (fd < 0) return false;
+  if (fd < 0) {
+    return false;
+  }
   intptr_t bytes_read = 0;
   do {
     int res = TEMP_FAILURE_RETRY_NO_SIGNAL_BLOCKER(