sip: Upgrade 6.8.3 -> 6.8.6

After the migration from Mercurial to GitHub the homepage has
changed and SIP has been licensed under the BSD-2-Clause license
since Feb 9, 2024. Upgrade to version 6.8.6:

- Handle single number macOS deployment targets
- Support for architectures where `char` is unsigned
- Support for building from git archives
- Run the tests using the current Python version

The project has a proper pyproject.toml which declares the
setuptools.build.meta PEP-517 backend.

Fixes:
WARNING: sip-6.8.6-r0 do_check_backend: QA Issue: inherits
setuptools3 but has pyproject.toml with setuptools.build_meta,
use the correct class [pep517-backend]

Please note SIP version 6.8.6 is present for branch Scarthgap and
it is required for PyQt6 6.8 from layer meta-qt6 (branch 6.8).

The work was sponsored by GOVCERT.LU.

License-Update: SIP is licensed under the BSD-2-Clause license.

Signed-off-by: Leon Anavi <leon.anavi@konsulko.com>
Signed-off-by: Armin Kuster <akuster808@gmail.com>

meta-oe/recipes-devtools/sip/sip_6.8.6.bb

@@ -3,15 +3,17 @@
 
 SUMMARY = "A Python bindings generator for C/C++ libraries"
 
-HOMEPAGE = "https://www.riverbankcomputing.com/software/sip/"
-LICENSE = "GPL-2.0-or-later"
+HOMEPAGE = "https://github.com/Python-SIP/sip"
+LICENSE = "BSD-2-Clause"
 SECTION = "devel"
-LIC_FILES_CHKSUM = "file://LICENSE-GPL2;md5=e91355d8a6f8bd8f7c699d62863c7303"
+LIC_FILES_CHKSUM = "file://LICENSE;md5=ed1d69a33480ebf4ff8a7a760826d84e"
 
-inherit pypi setuptools3 python3native
+inherit pypi python_setuptools_build_meta python3native
 
 PYPI_PACKAGE = "sip"
-SRC_URI[sha256sum] = "888547b018bb24c36aded519e93d3e513d4c6aa0ba55b7cc1affbd45cf10762c"
+SRC_URI[sha256sum] = "7fc959e48e6ec5d5af8bd026f69f5e24d08b3cb8abb342176f5ab8030cc07d7a"
+
+DEPENDS += "python3-setuptools-scm-native"
 
 RDEPENDS:${PN} = " \
     python3-core \