fix. changing clang lib64 to lib for android-ndk-r28c.

[nikescar]

this is android sdk workflow fix for android-ndk-r28c.

looks like android clang lib dir has changed name from lib64 to lib.

[nikescar]

i have tested with this changes. it failed.

$ x build --arch arm64 --platform android
...
[2/3] Build rust `mobile` [316ms]
[3/3] Create apk
Error: failed to fill whole buffer

after replacing android sdk to stock it gives detail message. but it failed too.

[2/3] Build rust `mobile` [38580ms]
[3/3] Create apk
Error: unrecognized chunk ResChunkHeader { ty: 15076, header_size: 0, size: 514 }

after replace debug version of xbuild shows different error.

[2/3] Build rust `mobile` [377ms]
[3/3] Create apk
2025-08-05T15:06:11.485119Z ERROR log: thread 'main' panicked at 'assertion `left == right` failed
  left: 16
 right: 8': apk/src/res.rs:687 log.target="panic" log.module_path="log_panics" log.file="/home/wj/.cargo/registry/src/index.crates.io-1949cf8c6b5b557f/log-panics-2.1.0/src/lib.rs" log.line=130