Work around redirection issue on windows buildbots

[tkelman]

with documentation build, ref #18588 (comment)
redirecting to a file should work, but redirecting to a cygwin pipe
or driving application like perl or python (in the buildbot case) doesn't

test builds from this branch:
https://build.julialang.org/builders/package_win6.2-x64/builds/1049
https://build.julialang.org/builders/package_win6.2-x86/builds/984

vs master:
https://build.julialang.org/builders/package_win6.2-x64/builds/1045
https://build.julialang.org/builders/package_win6.2-x86/builds/980

[MichaelHatherly]

Thanks.

Should the other rules (such as check and pdf) that get run on make release-candidate also get redirected?

[tkelman]

that rule doesn't happen on the buildbots, it's a manual check

[tkelman]

this might actually not be necessary? I don't see how, but #19539 apparently got things working here. closing for now, will reopen and test again if it comes back

[tkelman]

Hm it didn't fix make cleanall && make -j4 install | tee install.log 2>&1 locally though. Jameson's suggestion from #11727 looks like it might work in a slightly less fiddly way that wouldn't be an issue to do the same thing everywhere.