Globally replace _T() with wxT().

Standardize on using a single macro across all wxWidgets sources and solve the name clash with Sun CC standard headers (see #10660).

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@61508 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

tests/streams/tempfile.cpp

@@ -43,7 +43,7 @@ private:
 TestFile::TestFile()
 {
     wxFile file;
-    m_name = wxFileName::CreateTempFileName(_T("wxtest"), &file);
+    m_name = wxFileName::CreateTempFileName(wxT("wxtest"), &file);
     file.Write("Before", 6);
 }