Work around copy_file_range() bug in eCryptFs

When programs like ar.ape and compile.ape are run on eCryptFs partitions
on Linux, copy_file_range() will fail with EINVAL which is wrong because
eCryptFs which doesn't support this system call, should raise EOPNOTSUPP

See https://github.com/jart/cosmopolitan/discussions/1305

tool/build/ar.c

@@ -298,6 +298,7 @@ static void CopyFileOrDie(const char *inpath, int infd,    //
       if (got != -1) {
         exchanged = got;
       } else if (errno == EXDEV ||       // different partitions
+                 errno == EINVAL ||      // possible w/ ecryptfs
                  errno == ENOSYS ||      // not linux or freebsd
                  errno == ENOTSUP ||     // probably a /zip file
                  errno == EOPNOTSUPP) {  // technically the same