Snippets for adjtimex 1.29 from Alpine loongarch64

Sourced from https://build.alpinelinux.org/buildlogs/build-edge-loongarch64/testing/adjtimex/adjtimex-1.29-r0.log.

• adjtimex.c:729:7: warning: variable 'saveerr' set but not used [-Wunused-but-set-variable]
    729 |   int saveerr;
        |       ^~~~~~~
  

• adjtimex.c:1339:10: warning: variable 'ret' set but not used [-Wunused-but-set-variable]
   1339 |   int n, ret;
        |          ^~~
  

• adjtimex.c:1338:8: warning: variable 'ch' set but not used [-Wunused-but-set-variable]
   1338 |   char ch, buf[64], *s;
        |        ^~