add lenovo x201 support

note: me6_update_parser needs to be written, similar
to me7_update_parser, to generate the partition
tables within intel me6 on lenovo bios updates.

the current logic in lbmk goes like this:
mkdir -p vendorfiles/cache/

and save your factory dump as:
vendorfiles/cache/x201_factory.rom

the build system has been modified, in such a way
as to support extracting me.bin (which is the full
one) and then neutering from this.

this is done automatically, if the file is present,
but you must first insert that file there, which means
you'll need a dump of the original boot flash on your
thinkpad x201

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

script/vendor/download

@@ -22,7 +22,8 @@ uefiextract="${PWD}/src/uefitool/uefiextract"
 
 eval "$(setvars "" _b _dl EC_url EC_url_bkup EC_hash DL_hash DL_url DL_url_bkup \
     E6400_VGA_DL_hash E6400_VGA_DL_url E6400_VGA_DL_url_bkup E6400_VGA_offset \
-    E6400_VGA_romname SCH5545EC_DL_url SCH5545EC_DL_url_bkup SCH5545EC_DL_hash)"
+    E6400_VGA_romname SCH5545EC_DL_url SCH5545EC_DL_url_bkup SCH5545EC_DL_hash \
+    is_rom)"
 
 main()
 {
@@ -97,11 +98,18 @@ fetch()
 	[ "${5#/}" = "${5}" ] || err "fetch: absolute path not allowed: '${5}'"
 	_dest="${5##*../}"
 	_dl="${vendir}/cache/${dlsum}"
+	dl_fail=""
 
 	x_ mkdir -p "${_dl%/*}"
 
-	dl_fail="y"
-	vendor_checksum "${dlsum}" "${_dl}" && dl_fail="n"
+	is_rom="n"
+	if [ "${dl}" = "rom" ] || [ "${dl_bkup}" = "rom" ]; then
+		dl_fail="n"
+		is_rom="y"
+	else
+		dl_fail="y"
+		vendor_checksum "${dlsum}" "${_dl}" && dl_fail="n"
+	fi
 	for url in "${dl}" "${dl_bkup}"; do
 		[ "${dl_fail}" = "n" ] && break
 		[ -z "${url}" ] && continue
@@ -137,8 +145,14 @@ mkdirs()
 	mkdir -p "${1%/*}" || err "mkdirs: !mkdir -p ${1%/*}"
 	x_ rm -Rf "${appdir}"
 	x_ mkdir -p "${appdir}/"
-	extract_archive "${_dl}" "${appdir}" || \
-	    [ "${2}" = "extract_e6400vga" ] || err "mkdirs ${1} ${2}: !extract"
+	if [ "${is_rom}" = "y" ]; then
+		cp "${_dl}" "${appdir}" || \
+		    err "mkdirs copyrom ${_dl}: can't copy to appdir"
+	else
+		extract_archive "${_dl}" "${appdir}" || \
+		    [ "${2}" = "extract_e6400vga" ] || \
+		    err "mkdirs ${1} ${2}: !extract"
+	fi
 }
 
 extract_intel_me()
@@ -152,6 +166,7 @@ extract_intel_me()
 	sdir="$(mktemp -d)"
 	mkdir -p "${sdir}" || err "extract_intel_me: !mkdir -p \"${sdir}\""
 	(
+	[ "${cdir#/a}" != "${cdir}" ] && cdir="${cdir#/}"
 	cd "${cdir}" || err "extract_intel_me: !cd \"${cdir}\""
 	for i in *; do
 		[ -f "${_me}" ] && break
@@ -170,6 +185,7 @@ extract_intel_me()
 			continue
 		fi
 		cdir="${1}"
+		[ "${cdir#/a}" != "${cdir}" ] && cdir="${cdir#/}"
 		cd "${cdir}"
 	done
 	)