Based on https://talk.maemo.org/showthread.php?t=101156 thread by n9erator, I managed to repeat his steps (with little newer OpenSSL, 1.0.2u) and get TLS 1.2 support in (probably most of) Qt apps, mainly built-in browsers. TLS 1.2 sites work and report no certificate issues.

You can download my package here:

http://wunderwungiel.pl/MeeGo/files/...or%20N9.tar.gz

Keep in mind it replaces system packages, so be brave
I tested built-in browser, Warehouse and Helium Reborn, they all support TLS 1.2 with my package.

And enjoy