New utility: nscd cache dumper

[Joseph Myers]

This has broken the glibc build for most or all architectures.

cachedumper.c: In function 'nscd_print_cache':
cachedumper.c:113:37: error: implicit declaration of function 'roundup' [-Werror=implicit-function-declaration]
  113 |   char *data = (char *) &dps->array[roundup (dps->module,
      |                                     ^~~~~~~

https://sourceware.org/pipermail/libc-testresults/2020q1/005898.html

-- 
Joseph S. Myers
joseph@codesourcery.com