Clapper optimized for Pinephone

This build have been optimized for Pinephone, so it is likely it will not work on other devices. The applied optimization flags are:

• -march=armv8-a+crypto -mtune=cortex-a53
• -ftree-vectorize -ftree-slp-vectorize
• -flto

Clapper generic aarch64

This is the plain build of Clapper for generic aarch64. No additional optimization flags, other than release build configuration, has been applied.