utils: add -src to system package name blacklist

oe.utils.packages_filter_out_system() returns PACKAGES after removing "system"
packages but it doesn't handle ${PN}-src as generated by
PACKAGE_DEBUG_SPLIT_STYLE=debug-with-srcpkg.

(From OE-Core rev: 162632d3d1e40c83ed9c5d49a026edf3912860a0)

Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/lib/oe/utils.py

@@ -214,7 +214,7 @@ def packages_filter_out_system(d):
     PN-dbg PN-doc PN-locale-eb-gb removed.
     """
     pn = d.getVar('PN')
-    blacklist = [pn + suffix for suffix in ('', '-dbg', '-dev', '-doc', '-locale', '-staticdev')]
+    blacklist = [pn + suffix for suffix in ('', '-dbg', '-dev', '-doc', '-locale', '-staticdev', '-src')]
     localepkg = pn + "-locale-"
     pkgs = []