poco: Build as far as possible with parallel building

Signed-off-by: Timothy Gu <timothygu99@gmail.com>
apr-util: Always declare static calling convention on static builds

Signed-off-by: Timothy Gu <timothygu99@gmail.com>
poco: Update

Signed-off-by: Timothy Gu <timothygu99@gmail.com>
poco: Fix winsock2.h inclusion

Signed-off-by: Timothy Gu <timothygu99@gmail.com>
poco: Disable tests and samples

Fixes building. Poco doesn't supply a way to declare private/static lib deps
so linking fails for the tests.

Signed-off-by: Timothy Gu <timothygu99@gmail.com>