Fix check for __msan_keep_going in sanitizer-recover test
Fix check for __msan_keep_going in sanitizer-recover test

Match `@__msan_keep_going = weak_odr constant i32 1`.

graydon/rust,aidancully/rust,aidancully/rust,graydon/rust,graydon/rust,aidancully/rust,graydon/rust,graydon/rust,aidancully/rust,aidancully/rust,graydon/rust,aidancully/rust