So they are distinct from CC3200 projects during import

Also update compiler version (5.2.7 -> 5.2.8)

PUBLISHED_FROM=23834212eb51ad068579726a2870e8e6ae87ab9c

Main TODOs:
1. the spec requires the impl to resend the reply once and
   to send gratuitous updates

2. advertise our clubby services as DNS-SD sub-services.

---

Tested with:

1. https://play.google.com/store/apps/details?id=com.grokkt.android.bonjour&hl=en
2. https://play.google.com/store/apps/details?id=com.druk.bonjour.browser&hl=en
3. osx `dns-sd`

Works well enough; it doesn't have some glitches due the fact that we
don't retransmit yet and we don't send gratuitous updates.

PUBLISHED_FROM=38d7a50beb274d4aeeda5b0b58e44dfa0789da84

PUBLISHED_FROM=27ed0bd32e33252495b92361d2943a3450448f62

Make paths embedded in amalgamated files nice and relative.
This facilitates subsequent clean un- and re-amalgamation.

PUBLISHED_FROM=d83e6000617c54ceaeb78b80c25814996043fe66

PUBLISHED_FROM=426ff040865ea9626ba62bcbca3aa84fb40fd3ea

PUBLISHED_FROM=6052b7bfec6af33328cbe369da60e9672ebac437

PUBLISHED_FROM=46a7902a727e0ba34c3dbbe5ee04d5119afbaaff

PUBLISHED_FROM=6052b7bfec6af33328cbe369da60e9672ebac437

PUBLISHED_FROM=c5f6b0c64bc1e43030743b6aae5d06ae231df5dc

PUBLISHED_FROM=7e88f60283d499732e8df663814067849d9567bb

PUBLISHED_FROM=355fea9a5a75ac926d4c64d41828ebcd96c04080

PUBLISHED_FROM=ae8d436db9aee9aec7b5ac1cbee6bc4e32d8c6cf

PUBLISHED_FROM=a7ca2e0b705390b32bf2bac44aaaf60c6fcc8522

PUBLISHED_FROM=9e29cac6a7d4b632b7f4a3ab0fe5411368ad0f5a

PUBLISHED_FROM=450e5c045b6515fba0e0614c6d76a58712c72160

PUBLISHED_FROM=04bcd98025263f32d337730cf179bdfc35b683f1

PUBLISHED_FROM=40d62ce03a4f739b458076395941e4ad7c932fb3

PUBLISHED_FROM=04bcd98025263f32d337730cf179bdfc35b683f1

PUBLISHED_FROM=da57dfe52e315dc1901d761289f0445be6e93cea

PUBLISHED_FROM=da5f7f80a9876ac4f1889a1176a3048f47980659

PUBLISHED_FROM=da57dfe52e315dc1901d761289f0445be6e93cea

PUBLISHED_FROM=9e2d5c45d112b9e9493d995b12fe989e93d66d5b

PUBLISHED_FROM=dbf75bfba087f1b0aa0531e5003ba3e69ed1a6ab

PUBLISHED_FROM=293a54ab09e6879b6f0c36975a137eeaeff92098

PUBLISHED_FROM=4787d59fdc9f4da525ddfae46e5203d06a596ef4

PUBLISHED_FROM=c494ab910d0b1b98ea6ea4024450c60d0abff01d

PUBLISHED_FROM=4b6f7b6fb4559e085c93f5f8827b8fae1701de70

PUBLISHED_FROM=c494ab910d0b1b98ea6ea4024450c60d0abff01d

On my way, fixed a couple of cases where we had `()` in the header, and
non-empty argument list in the source file.

PUBLISHED_FROM=5519526cf84e2bbd425a726fcc112fea1a95cbf1

PUBLISHED_FROM=7f805d89dcb795c9b3ee637ef1dbdcfcf3323469

PUBLISHED_FROM=0d71533fd475c152c29fe304ca95559512a6059d

PUBLISHED_FROM=e9a4e5c7b4a1d03b93a2a79e29de19e60e919929

PUBLISHED_FROM=73e7ed5dd69cbca00ad6f67125915fbfb296770b

It was observed that sl_Send can return SL_EAGAIN, despite the fact that
we only call write_to_socket if it was reported as writeable.

PUBLISHED_FROM=e4cbacb3f16bb7abb479222d7dcbfbe113a39161

Complete rewrite of the C Clubby implementation: it is now modeled after
the Go implementation, with a slight difference that codec and channel
are the same object (something we should probably do in Go as well, as
we only have a single type of channel so far, which is used with all
types of codecs).

This implementation also comes with a new external API,
which is hopefully cleaner and easier to use (see mg_clubby.h).

In this PR I am not adding any new types of channels, but a UART channel
as well as websocket listener channel will be added after this lands.

PUBLISHED_FROM=d545d4bb6434e2a02ad159f9e4b64e594a4797e7

PUBLISHED_FROM=20d24793d766ee289c6bde95bd5ad01202cd614b

PUBLISHED_FROM=fc3f24d40f92f206e5de4a2fd15100430db87717

PUBLISHED_FROM=8945dc72ce22d48c582e7cdd01348494677ac5bb

PUBLISHED_FROM=6bf2a710edaae6133d68eaf900ede14bba75ad5a