mjsunit/harmony/atomics.js fails

[qjivy]

cmd line:

./out/riscv32.release/d8 --test ./test/mjsunit/mjsunit.js ./test/mjsunit/harmony/atomics.js --harmony-sharedarraybuffer

error log:

Received signal 11 SEGV_MAPERR 000000000001

==== C stack trace ===============================

 [0x000057bde07f]
 [0x000057bddf8e]
 [0x0000f7f6a0a0]
 [0x000056ebefb4]
 [0x0000575f4f19]
 [0x0000575ff72f]
 [0x0000575f358e]
 [0x0000576051dc]
 [0x0000576052e3]
 [0x000057605667]
 [0x000056f49b1f]
 [0x000056f4a3d5]
 [0x000056db41b3]
 [0x000056db3bff]
 [0x000056d82eeb]
 [0x000056d972dd]
 [0x000056d9a57b]
 [0x000056d9cab1]
 [0x000056d9cc1f]
 [0x0000f7c3afa1]
 [0x000056d78b51]
[end of stack trace]

[qjivy]

fixed by #688