Release v1.5.3

This is a minor, bugfix release to v1.5.2. If you are already on v1.5.2, you can upgrade simply by running genup (or waiting for the automated weekly update to do this for you), and rebooting your system once complete.

Users on releases earlier than v1.5.2 should follow the manual upgrade instructions to 1.5.2 below; the final genup step therein will actually bring you to v1.5.3 now.

You can easily check your current version at any time, by issuing:

demouser@pi64 ~ $ eix rpi-64bit-meta

Changes in this release (see main project page for further details):

• Updated the uploadable firmware file /lib/firmware/brcmfmac43455-sdio.bin (for the RPi3B+/4B's CYW43455 WiFi/BT chip) to match that provided by the Raspbian distribution (by adding their newer version of this file to the sys-firmware/brcm43430-firmware package, controlled by the 43455-fix USE flag, removing it from sys-kernel/linux-firmware, basis the same USE flag, and adding the 43455-fix USE flag to the default profile). This change will (hopefully) improve WiFi performance / stability meaningfully, particularly on the RPi4B (where, for some APs, the older driver was preventing association entirely). Thanks to haaldemir for reporting.

• Bumped media-libs/raspberrypi-userland, as 6by9's pointer-wrangling PR#586 (64-bit userland MMAL) has now been tidied up and merged into raspberrypi-userland upstream.

• Upgraded the shipped kernels, to bcm{rpi3,2711}-kernel-bis-bin-4.19.89.20191217.

• Various minor ebuild tidy-ups.

• All packages brought up-to-date against the Gentoo tree, as of 14 December 2019 (so e.g., sys-devel/clang is now at 9.0.1_rc2).