Manpages of src:sdl-stretch in Debian buster

• SDL_GetRowStretchCode(3)
• SDL_NewRowStretchCode(3)
• SDL_PutRowStretchCode(3)
• SDL_RunRowStretchCode(3)
• SDL_SetRowStretchCode(3)
• SDL_StretchInfo(3)
• SDL_StretchRow1(3)
• SDL_StretchRow2(3)
• SDL_StretchRow3(3)
• SDL_StretchRow4(3)
• SDL_StretchRowInfo(3)
• SDL_StretchSurfaceBlit(3)
• SDL_StretchSurfaceRect(3)
• SDL_StretchSurface_23(3)
• SDL_stretch.h(3)