A64: Synchronize with r16993.

test/mjsunit/regress/regress-embedded-cons-string.js

Index: test/mjsunit/regress/regress-embedded-cons-string.js
diff --git a/test/mjsunit/regress/regress-embedded-cons-string.js b/test/mjsunit/regress/regress-embedded-cons-string.js
index 58a0b1c86960fc93005390dda0c9a375ebd08335..32b900b15b4dfde108c98b961ee7a42b3031da8a 100644
--- a/test/mjsunit/regress/regress-embedded-cons-string.js
+++ b/test/mjsunit/regress/regress-embedded-cons-string.js
@@ -27,7 +27,7 @@
 
 // Flags: --fold-constants --nodead-code-elimination
 // Flags: --expose-gc --allow-natives-syntax
-// Flags: --concurrent-recompilation --concurrent-recompilation-delay=300
+// Flags: --concurrent-recompilation --concurrent-recompilation-delay=600
 
 if (!%IsConcurrentRecompilationSupported()) {
   print("Concurrent recompilation is disabled. Skipping this test.");