Missing includes (Windows --disable-pch)

Change-Id: Iea067e3529de9208bd0a00c276eb03858816bd00
Reviewed-on: https://gerrit.libreoffice.org/57996
Tested-by: Jenkins
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>

chart2/source/tools/InternalDataProvider.cxx

@@ -19,6 +19,7 @@
 
 #include <rtl/math.hxx>
 
+#include <iterator>
 #include <valarray>
 
 #include <InternalDataProvider.hxx>

vcl/win/gdi/salfont.cxx

@@ -35,6 +35,7 @@
 #include <osl/file.hxx>
 #include <osl/process.h>
 #include <rtl/bootstrap.hxx>
+#include <rtl/tencinfo.h>
 #include <o3tl/char16_t2wchar_t.hxx>
 #include <tools/helpers.hxx>
 #include <tools/stream.hxx>