sanity/patch.py: Remove commands module usage

The commands module is removed in python3. Use the subprocess module instead
and the pipes module to replace the mkargs usage.

(From OE-Core rev: e2e1dcd74bc45381baccf507c0309dd792229afe)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/lib/oe/patch.py

@@ -17,7 +17,7 @@ class CmdError(bb.BBHandledException):
 
 
 def runcmd(args, dir = None):
-    import commands
+    import subprocess, pipes
 
     if dir:
         olddir = os.path.abspath(os.curdir)
@@ -27,10 +27,10 @@ def runcmd(args, dir = None):
         # print("cwd: %s -> %s" % (olddir, dir))
 
     try:
-        args = [ commands.mkarg(str(arg)) for arg in args ]
+        args = [ pipes.quote(str(arg)) for arg in args ]
         cmd = " ".join(args)
         # print("cmd: %s" % cmd)
-        (exitstatus, output) = commands.getstatusoutput(cmd)
+        (exitstatus, output) = subprocess.getstatusoutput(cmd)
         if exitstatus != 0:
             raise CmdError(exitstatus >> 8, output)
         return output