Generate flashable images for the Archer C7 v2 with current stock firmware
again.

To set the region code, the GLUON_REGION variable must be set to "us" or
"eu" in site.mk or as a make argument.

Fixes #860

Fixes #800

Includes a few security updates and enables Curve25519 support.

Fixes #223

This patchset enables the RX LNA for the CPE210/510, improving RX by about
20dB. The profiles for CPE210 and CPE510 is split into two images.

The problematic patch switching the CPE510 to the secondary ART is left
out.

Fixes #658

Caused by a broken backport.

Fixes #689

Also switch to kmod-ath10k-ct, so we can drop our AP+IBSS patch.

Fixes #812

Needs more testing, high packet loss at the moment.

Fixes #811

The new MR1750v2 device support is only available in LEDE master. The
relevant patches have to backported to add support for them in Gluon

Signed-off-by: Sven Eckelmann <sven.eckelmann@open-mesh.com>

The new OM2P-HSv3 device support is only available in LEDE master. The
relevant patches have to backported to add support for them in Gluon

Signed-off-by: Sven Eckelmann <sven.eckelmann@open-mesh.com>

This reverts commit ffd1f0b3.

Another backported upstream change.

Packages in the openwrt-routing master have adjusted to this upstream
change, so we follow. Also saves a bit of space.

Mainly applying a vendor patch from https://github.com/domino-team/OpenWrt-patches

(https://raw.githubusercontent.com/domino-team/OpenWrt-patches/master/AR150%2C%20AR300%2C%20Domino%20-%20CC1505/000-gl-ar150-cc.patch)

This patchset enables the RX LNA for the CPE210/510, improving RX by about
20dB. The profiles for CPE210 and CPE510 is split into two images, so the
CPE510 can use the correct ART offset, improving the TX power by 10dB.

Fixes #796

For some reason, the filenames of the OpenMesh support patches were
truncated.

Most doubles that are delivered via respondd have limited input
precision, but are converted with up to 17 digits of precision. That can
cause ugly blowups like 0.2800000000000001 in the output, which is
avoided by specifying better format strings (like "%.2f" in most cases).

The new ath9k/ath10k based devices are only available in OpenWrt trunk. The
relevant patches have to backported to add support for them in Gluon

Signed-off-by: Sven Eckelmann <sven.eckelmann@open-mesh.com>

The workaround to generate sysupgrade images for OpenMesh devices in gluon
is replaced in LEDE/OpenWrt by a special patch. It is therefore better to
drop the workaround and use the upstream version.

Reported-by: Matthias Schiffer <mschiffer@universe-factory.net>
Signed-off-by: Sven Eckelmann <sven.eckelmann@open-mesh.com>

Also backport some patches improving QCA956x support.

Make pkg-config, mkimage and gcc build with GCC 6 as host compiler. Fix
miscompilation of node.

Fixes #755