Fix native class inheritance for devtool recipes

This fixes a bitbake warning in hapsigner and packing-tool recipes. The native class must be inherited last.

Ticket: #26 (closed)

requested review from @robertd and @esben

assigned to @thierrye

changed the description

approved this merge request

added 4 commits

• a8718880...e0f1af31 - 2 commits from branch eclipse/oniro-core:kirkstone
• 867b1b1a - packing-tool: Inherit native class last
• 92dd81be - hapsigner: Inherit native class last

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approved this merge request

mentioned in commit 8295fd9e

merged