[Bug testsuite/52641] New: Test cases fail for 16-bit int targets

[gjl at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52641
             Bug #: 52641
           Summary: Test cases fail for 16-bit int targets
    Classification: Unclassified
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: testsuite
        AssignedTo: unassig...@gcc.gnu.org
        ReportedBy: g...@gcc.gnu.org
            Target: avr, m32c, m68k, stormy16, cr16, pdp11, h8300, rl78


Many test cases fail because they assume sizeof(int) >= 4.

This PR is not for one specific test case, it's to have a PR to file respective
fixes as new test cases enter the test suite.