make skeleton

[Gilles]

Making my first steps with nard and trying to build skeleton on Ubuntu.

On the help.html page, libz-dev is listed as a requirement on Ubuntu.
That module is not in Ubuntu 18.04, but the Debian equivalent zlib1g-dev
is. In addition, I note that z-lib is in /apps. So that should not cause
any problem.

Building skeleton ends with this error:

/nard/util/crosstool-ng/crosstool-ng-1.23.0.99.g8f8e131d/scripts/functions:
line 279: printf: write error: Resource temporarily unavailable
[ERROR] 
[ERROR]  >>
[ERROR]  >>  Build failed in step 'Installing pass-1 core C gcc compiler'
[ERROR]  >>        called in step '(top-level)'
[ERROR]  >>
[ERROR]  >>  Error happened in: CT_DoLog[scripts/functions at 279]


line 279 in functions is:
           printf "${CT_LOG_PROGRESS_BAR:+\r}[%-5s]%*s%s%s\n" "${cur_L}"
"${indent}" " " "${line}" >&6

I ran it a second time with a similar result.

~ Gilles