Are you using 32 or 64 bit VM here? I think that may be the reason.
I'm using 64 bit and the same piece looks like the below for me, different in one line, that bold one.
There were problems with galileo BSPs being built on 32 bit machines in the past, I guess that may be a similar one.
Let's see if that's the case.
<cut>
Compiling with SSL support
-- Found OpenSSL: /home/ed/emb_dev/yocto/ww36/edison-src/build/tmp/sysroots/edison/usr/lib/libssl.so;/home/ed/emb_dev/yocto/ww36/edison-src/build/tmp/sysroots/edison/lib/libcrypto.so (found version "1.0.1g")
OpenSSL include dir: /home/ed/emb_dev/yocto/ww36/edison-src/build/tmp/sysroots/edison/usr/include
OpenSSL libraries: /home/ed/emb_dev/yocto/ww36/edison-src/build/tmp/sysroots/edison/usr/lib/libssl.so;/home/ed/emb_dev/yocto/ww36/edison-src/build/tmp/sysroots/edison/lib/libcrypto.so
Searching for OpenSSL executable and dlls
OpenSSL executable: /home/ed/emb_dev/yocto/ww36/edison-src/build/tmp/sysroots/x86_64-linux/usr/bin/openssl
Generating SSL Certificates for the test-server...
Generating a 1024 bit RSA private key
..........................................++++++
..........................................++++++
writing new private key to '/home/ed/emb_dev/yocto/ww36/edison-src/build/tmp/work/core2-32-poky-linux/libwebsockets/1.23-r0/build/libwebsockets-test-server.key.pem'
-----
You are about to be asked to enter information that will be incorporated
into your certificate request.
<cut>