Log Message:
gimp: update to 2.10.38.

Overview of Changes from GIMP 2.10.36 to GIMP 2.10.38
=====================================================

This release features some important feature backport for Windows: support of
Windows Ink API for input devices (i.e. graphics tablets in particular).

Other than this, it is mostly a bug-fix release of core and plug-in code. On any
OS other than Windows, there are no functional changes, though you will want to
update for fixes.

Core:

  - Windows Ink support backported from GIMP 3 (this also relies on GTK+3
    backports so the build for GIMP 2.10.38 requires specially-patched GTK+2, on
    Windows only).
  - On Windows, it would now be possible to use devices attached after GIMP has
    started through a fallback device.

Translations:

  - 15 translations were updated: Belarusian, Brazilian Portuguese, British
    English, Danish, Georgian, German, Hungarian, Icelandic, Italian, Norwegian
    Nynorsk, Slovenian, Spanish, Swedish, Turkish, Ukrainian.

Build:

  - Many GTK+2 patches for Windows (see #7498) were backported specially from
    newer GTK versions and are integrated in our installer.