[Testsuite,committed] Fix some tests for 16-bit integers

[Georg-Johann Lay]

Committed to fix some fallout from testsuite.

http://gcc.gnu.org/viewcvs?view=revision&revision=187588


        PR testsuite/52641
        * gcc.dg/pr52549.c: Fix test for long != void*
        * gcc.c-torture/execute/pr52979-1.x: New file.
        * gcc.c-torture/execute/pr52979-2.x: New file.