build: Prefix SDL- to revision from REVISION.txt This makes it possible to get the version number of an unknown SDL binary from `strings libSDL3.so.0 | grep SDL-`, like we could for SDL 2. Resolves: https://github.com/libsdl-org/SDL/issues/14114 Signed-off-by: Simon McVittie <smcv@collabora.com> (cherry picked from commit 618b7b6c736bb9c70fde5f98e01b45c4357a65ea)
Simple DirectMedia Layer (SDL for short) is a cross-platform library designed to make it easy to write multi-media software, such as games and emulators.
You can find the latest release and additional information at: https://www.libsdl.org/
Installation instructions and a quick introduction is available in INSTALL.md
This library is distributed under the terms of the zlib license, available in LICENSE.txt.
Enjoy!
Sam Lantinga (slouken@libsdl.org)