fix(configure): misleading error if C compiler is not installed

[aafeijoo-suse]

While preparing a new system for development, ./configure reaches a point where it fails with:

$ ./configure
dracut needs fts development files.

After installing the fts library, ./configure keeps throwing the same error:

$ rpm -qf /usr/include/fts.h
glibc-devel-2.38-6.1.x86_64
$ ./configure
dracut needs fts development files.

The problem is ${CC} $CFLAGS $LDFLAGS conftest.c can also fail if the compiler referenced by $CC is not installed.

Checklist

• [X] I have tested it locally
• [ ] I have reviewed and updated any documentation if relevant
• [ ] I am providing new code and test(s) for it