Return the old file descriptor/pointer from wx(F)File::Detach().

Make Detach() more convenient to use.

Closes #15494.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@74798 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Don't reset m_fp if wxFFile::Open() fails.

This makes it behaviour consistent with wxFile::Open().

Also don't use Detach() in Close(), again for consistency with wxFile, even if
this has no user-visible effects at all.

See #15494.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@74799 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Handle non-ASCII output from lsb_release in wxGetLinuxDistributionInfo().

Assume that lsb_release always output UTF-8 text as this seems to be the case
right now for the only (common) Linux distribution which uses anything but
ASCII for its code name (Fedora 19 "Schrödinger's Cat").

Closes #15492.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@74800 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Polish translations update from Grzegorz Zlotowicz.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@74801 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
Another Tamil translations update from Dinakar T.D.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@74802 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775