wic: use native parted

Used exec_native_cmd instead of find_binary_path to run parted.
Got rid of find_binary_path as it's not used anywhere else.

There are several tools wic is trying to find not only in sysroot,
but also in host root. Parted is a special as on some distros it's
installed in /usr/sbin, which is not in the user's PATH. This makes
wic to fail with error "External command 'parted' not found, exiting."

[YOCTO #7122]

(From OE-Core rev: 76adf38c0d8e0faf04a5ecb3fcfbe831c85bb81f)

Signed-off-by: Ed Bartosh <ed.bartosh@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

scripts/lib/wic/utils/partitionedfs.py

@@ -40,13 +40,13 @@ class Image:
     An Image is a container for a set of DiskImages and associated
     partitions.
     """
-    def __init__(self):
+    def __init__(self, native_sysroot=None):
         self.disks = {}
         self.partitions = []
-        self.parted = find_binary_path("parted")
         # Size of a sector used in calculations
         self.sector_size = SECTOR_SIZE
         self._partitions_layed_out = False
+        self.native_sysroot = native_sysroot
 
     def __add_disk(self, disk_name):
         """ Add a disk 'disk_name' to the internal list of disks. Note,
@@ -225,11 +225,12 @@ class Image:
     def __run_parted(self, args):
         """ Run parted with arguments specified in the 'args' list. """
 
-        args.insert(0, self.parted)
+        args.insert(0, "parted")
+        args = ' '.join(args)
         msger.debug(args)
 
-        rc, out = runner.runtool(args, catch = 3)
-        out = out.strip()
+        rc, out = exec_native_cmd(args, self.native_sysroot)
+
         if out:
             msger.debug('"parted" output: %s' % out)