Bump glibc from 2.41 to 2.42

No new regressions.
Current regressions (with --enable-multilib):
```
               ========= Summary of gcc testsuite =========
                            | # of unexpected case / # of unique unexpected case
                            |          gcc |          g++ |     gfortran |
     rv32gc/ ilp32d/ medlow |    0 /     0 |    0 /     0 |    0 /     0 |
   rv32imac/  ilp32/ medlow |    0 /     0 |    0 /     0 |   43 /     8 |
     rv64gc/  lp64d/ medlow |   25 /     4 |    0 /     0 |    0 /     0 |
    rv64gcv/  lp64d/ medlow |  127 /    54 |    6 /     2 |    0 /     0 |
   rv64imac/   lp64/ medlow |   24 /     3 |    4 /     2 |   43 /     8 |
```

Signed-off-by: Christoph Müllner <[email protected]>

Author: cmuellner