Clean t_sname_match in lib/krb5/krb

Add a missing "$" to t_sname_match$(EXEEXT) in the clean rule in
lib/krb5/krb/Makefile.in.

https://github.com/krb5/krb5/commit/f22510adfba274c7302799965453e5d4aae3823a
Author: Tom Yu <tlyu@mit.edu>
Commit: f22510adfba274c7302799965453e5d4aae3823a
Branch: master
 src/lib/krb5/krb/Makefile.in |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)