recipetool: create: hide missing npm error when called from devtool

If devtool is called with a URL to a source repository containing a
node.js module, we don't know that until recipetool has fetched it, and
due to the structure of the code we have to exit with a special code in
order to let devtool know it needs to build nodejs-native. We also want
to suppress the error message that recipetool would normally print under
these circumstances; there is already a mechanism for this but it wasn't
operative in the case where we're pointed to a source repository rather
than an npm:// URL, so create some plumbing so that we know to hide the
message.

(From OE-Core rev: 0c2d0fbb1c6c5b82183799eb7ef80074f86bcfc4)

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

scripts/lib/recipetool/create_npm.py

@@ -189,7 +189,7 @@ class NpmRecipeHandler(RecipeHandler):
         files = RecipeHandler.checkfiles(srctree, ['package.json'])
         if files:
             d = bb.data.createCopy(tinfoil.config_data)
-            npm_bindir = check_npm(tinfoil)
+            npm_bindir = check_npm(tinfoil, self._devtool)
             d.prependVar('PATH', '%s:' % npm_bindir)
 
             data = read_package_json(files[0])