util: Add mremap syscall to AllowAddressSpaceAccess

src/util/syscall_sandbox.cpp

@@ -529,6 +529,7 @@ public:
         allowed_syscalls.insert(__NR_mlock);      // lock memory
         allowed_syscalls.insert(__NR_mmap);       // map files or devices into memory
         allowed_syscalls.insert(__NR_mprotect);   // set protection on a region of memory
+        allowed_syscalls.insert(__NR_mremap);     // remap a file in memory
         allowed_syscalls.insert(__NR_munlock);    // unlock memory
         allowed_syscalls.insert(__NR_munmap);     // unmap files or devices into memory
     }