In util/getroot and efidisk slightly modify exitsing comment to mostly
retain it but still make GCC7 compliant with respect to fall through
annotation.
In grub-core/lib/xzembed/xz_dec_lzma2.c it adds same comments as
upstream.
In grub-core/tests/setjmp_tets.c declare functions as "noreturn" to
suppress GCC7 warning.
In grub-core/gnulib/regexec.c use new __attribute__, because existing
annotation is not recognized by GCC7 parser (which requires that comment
immediately precedes case statement).
Otherwise add FALLTHROUGH comment.
Closes: 50598
* grub-core/video/readers/jpeg.c (JPEG_MARKER_DRI): New define.
(JPEG_MARKER_RST0): Likewise.
(JPEG_MARKER_RST1): Likewise.
(JPEG_MARKER_RST2): Likewise.
(JPEG_MARKER_RST3): Likewise.
(JPEG_MARKER_RST4): Likewise.
(JPEG_MARKER_RST5): Likewise.
(JPEG_MARKER_RST6): Likewise.
(JPEG_MARKER_RST7): Likewise.
(grub_jpeg_data): New fields dri, r1, bitmap_ptr.
(grub_jpeg_decode_dri): New function.
(grub_jpeg_decode_sos): Move image data related part into
grub_jpeg_decode_data function.
(grub_jpeg_decode_data): New function.
(grub_jpeg_reset): New function.
(grub_jpeg_decode_jpeg): Handle new markers.