hot-fix: Fix race in rwlock

Resetting the owner should be before the lock is unlocked, otherwise a waiter might lock and set a new owner before its reset.

src/core/libraries/kernel/threads/rwlock.cpp

@@ -177,13 +177,13 @@ int PS4_SYSV_ABI posix_pthread_rwlock_unlock(PthreadRwlockT* rwlock) {
     }
 
     if (prwlock->owner == curthread) {
-        prwlock->lock.unlock();
         prwlock->owner = nullptr;
+        prwlock->lock.unlock();
     } else {
-        prwlock->lock.unlock_shared();
         if (prwlock->owner == nullptr) {
             curthread->rdlock_count--;
         }
+        prwlock->lock.unlock_shared();
     }
 
     return 0;