Log Message:
amanda-common: Configure fixes

The configure script creates massive amounts of spam when using NetBSD's
sh due to the non-standard test(1) args.

For some reason, the test for compiler flag -msse4.2 is failing, even
though it's present in the cc -v --help output (is cwrappers doing
something strange?). For now, commit a workaround. The package is actually
doing runtime detection of SSE4.2 properly, but expects compiler support
for -msse4.2 to be provided on x86.

PR 57130