doc: Update CHANGES

Signed-off-by: Kevin Cernekee <cernekee@gmail.com>
README: Add Google Play link

Signed-off-by: Kevin Cernekee <cernekee@gmail.com>
external: Build curl and libstoken using openconnect's standalone toolchain

Since openconnect now installs its own standalone toolchains and populates
the sysroot with libraries we can use, it eliminates the need to build
extra copies of libtomcrypt and openssl for stoken and curl.

To some extent this limits parallelism in the build, but it also results
in compiling fewer modules.

Signed-off-by: Kevin Cernekee <cernekee@gmail.com>
libs,assets: Update libstoken and curl objects

These were built under the new "standalone toolchain" scheme and are
now stripped.  This reduces the apk size by about 1MB, to ~5.1MB.

Signed-off-by: Kevin Cernekee <cernekee@gmail.com>
external: Remove redundant copies of libtomcrypt + openssl

Since curl has switched to GnuTLS, this also allows us to drop the OpenSSL
advertising clause.

Signed-off-by: Kevin Cernekee <cernekee@gmail.com>
external: Sync with openconnect rev ff2c518

Signed-off-by: Kevin Cernekee <cernekee@gmail.com>
libs: Sync with latest openconnect sources

Signed-off-by: Kevin Cernekee <cernekee@gmail.com>