Revision 412624

- Update sdl20 and satellite libraries to latest versions

sdl2: 2.0.3 -> 2.0.4
sdl2_image: 2.0.0 -> 2.0.1
sdl2_mixer: 2.0.0 -> 2.0.1
sdl2_net: 2.0.0 -> 2.0.1
sdl2_ttf: 2.0.12 -> 2.0.14

- Add LICENSE_FILE
- Strip libraries
- Switch to USES=localbase where applicable

PR:		207671
Submitted by:	devnexen@gmail.com, amdmi3
Approved by:	maintainer timeout (mva, 1 month)
Exp-run by:	antoine