devtool: add: ensure --color=never turns off recipetool colour output

(From OE-Core rev: 670bd063a5e0cdf89ea8d1f763af980d7e63d38a)

Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

scripts/lib/devtool/standard.py

@@ -82,7 +82,7 @@ def add(args, config, basepath, workspace):
     else:
         bp = args.recipename
     recipefile = os.path.join(recipedir, "%s.bb" % bp)
-    if sys.stdout.isatty():
+    if args.color == 'auto' and sys.stdout.isatty():
         color = 'always'
     else:
         color = args.color