make check was failing in util/gss-kernel-lib due to dependencies
when the build is configured with --with-system-et, because depfix.pl
wasn't smart enough to substitute the dependency on com_err.h in the
current directory.  Make depfix.pl smarter, and adjust COM_ERR_DEPS
to be com_err.h in gss-kernel-lib when building with the bundled
com_err.

https://github.com/krb5/krb5/commit/6aff398f9eead4c619d20a55e0c72459b7e1ef51
Commit By: ghudson
Revision: 25468
Changed Files:
U   trunk/src/util/depfix.pl
U   trunk/src/util/gss-kernel-lib/Makefile.in
U   trunk/src/util/gss-kernel-lib/deps