webp_to_sdl.c: fix file mode
webp_to_sdl.c: fix file mode

Change-Id: I1ca8506d40a60cd6db7f6f0d63a4431848bb0ea9

PKRoma/libwebp,PKRoma/libwebp,webmproject/libwebp,PKRoma/libwebp,PKRoma/libwebp,webmproject/libwebp,PKRoma/libwebp,PKRoma/libwebp,webmproject/libwebp,webmproject/libwebp,webmproject/libwebp