Fix expected test output on hppa

Fix expected test output on hppa

Recent changes in the hoisting code change the optimized gimple for the
shadd-3 testcase on the PA.  That in turn changes the number of expected
 shadd instructions.

I'm not entirely sure the test is actually testing what we want anymore
since I don't see a CSE for postreload to discover.  But I did verify
that the number of shadd instructions is sane, so I just changed the
count in the obvious way.

gcc/testsuite
	* gcc.target/hppa/shadd-3.c: Update expected output.