Font read cache test build (fixes Dissidia 012 menu lag)

Test build: flash0 font read cache. This build fixes lag in text-heavy screens of games that use the PSP system font. Known case: the Dissidia 012 [duodecim] menus froze for about 280 ms on every cursor move. See the README for details and upstream PR isage/Adrenaline#191.

This is an unofficial test build. It's built from upstream master at 4919c49 (newer than v8.0.2) plus the single fix commit 7830d65. Once the fix is merged upstream, use the official release instead.

Install (existing Adrenaline users)

1. Back up ux0:app/PSPEMUCFW/sce_module/ so you can go back.
2. Extract Adrenaline-fontfix-modules.zip, then copy the four files from sce_module/ into ux0:app/PSPEMUCFW/sce_module/, replacing the old ones.
3. If your ur0:tai/config.txt (or ux0:tai/config.txt) loads adrenaline_kernel.skprx from a path outside ux0:app/PSPEMUCFW/sce_module/ (for example ur0:tai/adrenaline_kernel.skprx), copy the new adrenaline_kernel.skprx to that path too, so the kernel and user modules match.
4. Reboot the Vita.

Adrenaline-fontfix.vpk is the full package, intended for fresh installs (see the upstream install guide).

Warning

Don't use System Settings → System Update inside Adrenaline while on this build. It installs the official version, which doesn't include this fix yet.

Tested

• Dissidia 012 (ULUS10566) on a real PS Vita: the menu lag is gone, the game holds ~30 fps, and no text corruption was seen.
• XMB text in English, Japanese, Korean and Simplified Chinese (game list, Saved Data Utility, settings, Epinephrine CFW settings, VSH menu) renders correctly.
• Other games, text OK: Digimon World Re:Digitize, Star Ocean: First Departure, Tales of Eternia, Valkyrie Profile: Lenneth, Itadaki Street. Switching games back to back works.
• Dissidia 012: one hour of play, plus sleep and resume in the menu, without regressions.

Report problems in this fork's Issues.

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