Made QFile benchmark compile and run for Symbian

- Temporary files need to be deleted after each test, as there is no
  space to have several 40MB files on typical device.
- Read buffer must be allocated dynamically, as Symbian devices have
  limited stack.
- Moved metatype declarations to proper place
- Changed _exit() -> exit()
- Removed assert from around mkdir - dir creation fails if dir exists,
  and dir was not created in release builds.
- Added QDir::Files to readSmallFiles test directory filter to actually
  find the files to read.
- Fixed filenames to absolute in readSmallFiles test so that it'll find
  the files even if they are not in current dir.
- Write a linefeed to the end of each created file in createSmallFiles,
  so that the files created have proper size
- Only create 1/10th of files in createSmallFiles for Symbian to
  speed up the test to bearable level.
- Added missing ::flose() call to QFileFromPosixBenchmark of open().
- Skipped Windows specific tests on non-Windows platform as just
  failing them left temporary files to disk

Task-number: QTBUG-6593
Reviewed-by: MariusSO

0 files changed, 0 insertions, 0 deletions