reproducibility: move repro excludes from AB config.json to meta-oe

For now, the known non-reproducible packages list is stored inside the
autobuilder config.json file. This is not ideal. Let's move this list
into each layers of meta-openembedded.

These lists can be used with, in local.conf:
  include conf/include/non-repro-meta-oe.inc
  OEQA_REPRODUCIBLE_EXCLUDED_PACKAGES = "${KNOWN_NON_REPRO_META_OE}"

Signed-off-by: Yoann Congal <yoann.congal@smile.fr>
Acked-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Signed-off-by: Khem Raj <raj.khem@gmail.com>

meta-webserver/conf/include/non-repro-meta-webserver.inc

@@ -0,0 +1,7 @@
+# List of known non-reproducible package of the meta-webserver layer
+# Please keep this list sorted
+KNOWN_NON_REPRO_META_WEBSERVER = " \
+    netdata \
+    netdata-dbg \
+    php-phar \
+"