Add cygwin-sdl build to buildRelease workflow (#476)

* Start cygwin-sdl builds: first pass at buildCygwinBuilderImage workflow.  Add makefile-cygwin.x86_64-sdl.

* WIP Dockerfile_cygwin_builder

* First pass of complete cygwin-sdl build workflow

* Fix indent error in buildCygwinBuilderImage.yml

* fix incorrect use of github token in buildCygwinBuilderImage.yml

* fix incorrect use of --build-arg in buildCygwinBuilderImage.

* fix incorrect docker build statement in buildCygwinBuilderImage.

* make docker tag lowercase since apparently Wiondows docker doesn't like uppercase tags in buildCygwinBuilderImage.

* fix quotiing on last commit in buildCygwinBuilderImage.

* fix download output location for SDL2 in buildCygwinBuilderImage.

* Add windows/cygwin build to buildRelease workflow

* Fix typos in buildRelease workflow

* Fix more typos in buildRelease workflow

* Debugging per-system if statements buildRelease workflow

* Debugging per-system if statements buildRelease workflow #2

* Debugging per-system if statements buildRelease workflow #3

* Fix checkout actions step to use powershell-sims not bash-isms in Windows job

* Fix Docker_env step to use powershell-isms not bash-isms in Windows job

* Fix Docker_env step to use powershell-isms not bash-isms in Windows job #2

* Fix Docker_env step to use powershell-isms not bash-isms in Windows job #3

* Revamp cygwin build to use docker build instead of docker buildxx because buildx seems to not like windows containers

* Fix some line split nonsense

* Fix typo in last commit

* Add proper repo info to Dockerfile_cygwin_maiko

* More debugging

* Revamp how cygwin-sdl is built - now build directly on runner and not via a Dcokerfile and docker.

* Fix typo

* Fix retrieve of sdl2

* Fix set up release tag action to ake account of the fact that Maiko has been checked out to cygwin\maiko instead of top level workspace

* Fix set up release tag action to ake account of the fact that Maiko has been checked out to cygwin\maiko instead of top level workspace #2

* Fix set up release tag action to ake account of the fact that Maiko has been checked out to cygwin\maiko instead of top level workspace #3

* Cleanup build maiko step

* Prevent git from messing uo line endings on checkout

* Fix copy of cygwin.x86_64 dir to relesase tars

* Set execute bit of (almost) all files in release tar; rearrange build step to use cyugwin bash as the shell

* Fix rearrange build step to use cyugwin bash as the shell

* Try a different way of rearrange build step to use cyugwin bash as the shell

* Fix typo

* When cygwin bash as shell did not work; reverting to brute-force way

* Hopefully fix release push not getting tar file

* Cygwin-sdl build working; remove debugging code

* Remove wrokflow files associated with abandoned attempts at building cygwin via docker

---------

Co-authored-by: Frank Halasz <fghalasz@interlisp.org>

.github/workflows/Dockerfile_maiko

@@ -1,6 +1,6 @@
 #*******************************************************************************
 #
-#  Dockerfile to build Maiko to be used by buildRelease github action
+#  Dockerfile to build Maiko for Linux to be used by buildRelease github action
 #  The output of this is intended to be a directory in the github workspace
 #  file system it is not intended to be a useable Docker image.
 #