add elf-size-analyze output to builds

[Habbie]

https://github.com/jedrzejboczar/elf-size-analyze is very useful, and has an HTML mode. Short summary of what it did on some recent versions:

00:14Z <Habbie> amd64 non-static build: 880kb quickjs, 600kb lvgl, 384kb curl, 1450kb fonts, 54kb uicomponents, 26kb argparse
00:14Z <Habbie> 3-9kb for each of front-lvgl, backend.cpp, domains.hpp, haentity, logger, wsconn
00:15Z <Habbie> and, apparently, 480kb of expanded templates from /usr/include :)
00:18Z <Habbie> that adds up to just under 4MB, the stripped binary is 5MB
00:18Z <Habbie> the static armel binary (harder to analyze because it is not a debug build) is 6.5MB
00:18Z <Habbie> these numbers are not all from the same commit

for the armel build, I wonder if we can make a separate debug file that it can maybe ingest, or invoke the tool before we strip?