test program build problem

test program build problem

Split out the "standalone" test code from trval.c, so we produce
trval.o only once, instead of twice with different compilation flags.
One case generated the "trval" program directly, but produced and
deleted trval.o as an intermediate step in the compiler, which messes
things up if make thinks it's already built trval.o for another test
program.

Make the standalone test into t_trval.

Build problem reported by Will Fiveash of Sun, about ten minutes ago.

ticket: new

git-svn-id: svn://anonsvn.mit.edu/krb5/trunk@19893 dc483132-0cff-0310-8789-dd5450dbe970