flit_core: clean up configure/compile

Make do_configure do nothing by default as the base configure isn't
useful, and invoke the build API directly instead of writing a script.

In the future, this can simply call python3-build.

(From OE-Core rev: 2d80529a486d25ad96c448499392547e82779de4)

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

meta/classes/flit_core.bbclass

@@ -3,15 +3,13 @@ inherit pip_install_wheel python3native python3-dir setuptools3-base
 DEPENDS += "python3 python3-flit-core-native python3-pip-native"
 
 flit_core_do_configure () {
-    mkdir -p ${S}/dist
-    cat > ${S}/build-it.py << EOF
-from flit_core import buildapi
-buildapi.build_wheel('./dist')
-EOF
+    :
 }
 
+# TODO: ideally this uses pypa/build
 flit_core_do_compile () {
-    ${STAGING_BINDIR_NATIVE}/${PYTHON_PN}-native/${PYTHON_PN} ${S}/build-it.py
+    mkdir -p ${S}/dist
+    nativepython3 -c "from flit_core import buildapi; buildapi.build_wheel('./dist')"
 }
 
 EXPORT_FUNCTIONS do_configure do_compile