[oe] [meta-python][PATCH] python3-importlib-metadata: fix class-target overriding default dependencies

[Nicola Lunghi]

in commit fcda3fb1a3fbfac075325482074898dfb7138da7
  python3-importlib-metadata: RDEPEND python3-misc only for target and nativesdk

The RDEPENDS for class target was "appended" with +=
  RDEPENDS_${PN}_class-target += "python3-misc"

Using += for class target does't append the dependencies to
the existing one, instead what it does is overwrite it.
This was causing the RDEPENDS to be wrongly set only to python3-misc
not including the one included in the inc file (zipp, pathlib2).
Use append instead.

Signed-off-by: Nicola Lunghi <nick83ola at gmail.com>
---
 .../python/python3-importlib-metadata_0.23.bb                 | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/meta-python/recipes-devtools/python/python3-importlib-metadata_0.23.bb b/meta-python/recipes-devtools/python/python3-importlib-metadata_0.23.bb
index 851d703c9..8a971dac0 100644
--- a/meta-python/recipes-devtools/python/python3-importlib-metadata_0.23.bb
+++ b/meta-python/recipes-devtools/python/python3-importlib-metadata_0.23.bb
@@ -1,5 +1,5 @@
 inherit pypi setuptools3
 require python-importlib-metadata.inc
 
-RDEPENDS_${PN}_class-target += "python3-misc"
-RDEPENDS_${PN}_class-nativesdk += "python3-misc"
+RDEPENDS_${PN}_append_class-target = " python3-misc"
+RDEPENDS_${PN}_append_class-nativesdk = " python3-misc"
-- 
2.20.1