pkgsi686Linux.libredirect: do no fail on 64-bit inodes

Without the change `pkgsi686Linux.libredirect` tests
fail on `btrfs` where inodes are outside 32-bit range:

$ nix build --no-link -f. -L pkgsi686Linux.libredirect
...
libredirect> test: test.c:95: main: Assertion `stat(TESTPATH, &testsb) != -1' failed.

As libredirect` intends to test 32-bit syscall
interface let's just skip the overflows.

pkgs/by-name/li/libredirect/test.c

···
 
     assert(access(TESTPATH, X_OK) == 0);
 
-    assert(stat(TESTPATH, &testsb) != -1);
+    // On EOVERFLOW checks below: when TESTPATH lands on a filesystem
+    // that requires 64-bit inode values (like btrfs used for a while)
+    // it will fail on 32-bit systems.
+
+    assert(stat(TESTPATH, &testsb) != -1 || errno == EOVERFLOW);
 #ifdef __GLIBC__
     assert(stat64(TESTPATH, &testsb64) != -1);
 #endif
-    assert(fstatat(123, TESTPATH, &testsb, 0) != -1);
+    assert(fstatat(123, TESTPATH, &testsb, 0) != -1 || errno == EOVERFLOW);
 #ifdef __GLIBC__
     assert(fstatat64(123, TESTPATH, &testsb64, 0) != -1);
 #endif