Add libkrb5support dependencies to test plugins

In some build environments, dependencies on libkrb5support can be
generated just from static inline functions in our header files, even
if those functions aren't used.  In two test plugin modules, use
$(KRB5_BASE_DEPLIBS) and $(KRB5_BASE_LIBS) to depend on libkrb5support
as well as libkrb5.  (This also pulls in libk5crypto, which is
unnecessary for these modules, but is inconsequential for a test
module.)  Reported by Will Fiveash.

https://github.com/krb5/krb5/commit/5568d31f45fb78f505340a5b520b22d4dd3f6522
Author: Greg Hudson <ghudson@mit.edu>
Commit: 5568d31f45fb78f505340a5b520b22d4dd3f6522
Branch: master
 src/plugins/hostrealm/test/Makefile.in |    6 +++---
 src/plugins/pwqual/test/Makefile.in    |    6 +++---
 2 files changed, 6 insertions(+), 6 deletions(-)