Arduino packaging must be in a single folder

[majenkotech]

A requirement for using the arduino-cli is that the compiler archive must contain only one root folder. At the moment the compiler is packaged as a tar file from inside the top level folder, rather than including that top level folder.

An example of how it should be:

$ tar -ztvf pic32-tools-143-3-Linux32-image.tar.gz 
drwxr-xr-x matt/matt         0 2017-04-27 21:44 pic32-tools-143/
drwxr-xr-x matt/matt         0 2017-04-27 21:44 pic32-tools-143/lib/
drwxr-xr-x matt/matt         0 2017-04-27 21:44 pic32-tools-143/lib/gcc/
drwxr-xr-x matt/matt         0 2017-04-27 21:44 pic32-tools-143/lib/gcc/pic32mx/
drwxr-xr-x matt/matt         0 2017-04-27 21:44 pic32-tools-143/lib/gcc/pic32mx/4.8.3/
drwxr-xr-x matt/matt         0 2017-04-27 21:44 pic32-tools-143/lib/gcc/pic32mx/4.8.3/micromips/
-rw-r--r-- matt/matt       795 2017-03-13 17:01 pic32-tools-143/lib/gcc/pic32mx/4.8.3/micromips/crtn.o
... etc ...

Converting one of the existing builds is easy enough:

$ mkdir pic32-tools-143
$ tar -C pic32-tools-143 -zxf pic32-tools-143-3-Linux32-image.tar.gz
$ tar -zcf pic32-tools-143-3-Linux32-image.tar.gz pic32-tools-143

And of course the file size and SHA-256 checksum will change so the JSON file will need to be updated with those new details.

[EmbeddedMan]

@jasonkajita @geoffwozniak-mchp Would the simplest way to fix this problem be to update the scripts you use to build the compiler outputs and then kick out a new release? I see that in chipKIT-compiler-builds repo we have a 1.43-4 "Pre-release" (from Apr 24 2018) in the releases section (which adds GDB support) but we haven't updated the chipkit JASON file to point to 143-4 yet.

I'm sure I can just download each compiler-build .tar.gz files, add the top level folder, then tar.gz them back up and upload as a new release. But that seems like a poor band-aid. To update the script(s) so that they will always be built properly in the future, then do a new release seems like the better choice. But I don't know how do do that - we will need you to do it.