tekhex test for commit bf0f85df1254 * testsuite/binutils-all/tek2.obj: Change to a 3 byte data file that triggers tekhex error fixed by commit bf0f85df1254. * testsuite/binutils-all/ar.exp: Adjust to suit. * testsuite/binutils-all/objcopy.exp (objcopy_tek2bin): New proc.