move ifd/gbe configs into config/ifd/

it doesn't really make sense for them to be under
blobs/ - nominally, they are blobs, but they are
well-understood data files containing config data,
that is easily parsed by tools like ich9show or
ifdtool (and tools like bincfg or nvmutil)

blobs/ has been re-purposed: this directory no longer
exists in lbmk, but it is created (and on .gitignore)
when needed, by blobutil

thus, the blobs/ directory shall only contain vendor
files, and only those files that libreboot scrubs from
releases. therefore, build/release/src can (and has
been) simplified; it currently copies just the ifd and
gbe files from blobs/, selectively, and this logic is
quite error prone, requiring maintenance. now, the
build/release/src script simply copies config/ (which
only ever contains distributable files) and entirely
ignores the blobs/ directory

the blob download script already creates the required
directory, except for the sch5545 download; this is
now fixed

lbmk code size is slightly smaller, due to this patch

Signed-off-by: Leah Rowe <leah@libreboot.org>

script/update/blobs/download

@@ -423,6 +423,9 @@ extract_sch5545ec()
 		printf "sch5545 firmware already downloaded\n" 1>&2
 		return 0
 	fi
+	[ -d "${_sch5545ec_destination%/*}" ] || \
+		mkdir -p "${_sch5545ec_destination%/*}" || \
+		    err "extract_sch: can't mkdir ${_sch5545ec_destination%/*}"
 
 	[ ! -d "${appdir}" ] || rm -Rf "${appdir}" || \
 	    err "extract_sch5545ec: can't remove ${appdir}"