fix 9999999-getentropy-stdcxx.patch

mozilla-central/patches/9999999-getentropy-stdcxx.patch

@@ -40,6 +40,6 @@ diff --git a/build/unix/stdc++compat/stdc++compat.cpp b/build/unix/stdc++compat/
 +extern "C" int
 +getentropy (void *buffer, size_t length)
 +{
-+  __set_errno (ENOSYS);
++  errno = ENOSYS;
 +  return -1;
 +}