PRODAM oligotm WASM: source, build inputs, and provenance

Primer3 upstream https://github.com/primer3-org/primer3
Release v2.6.1 commit 7f9f17d6012f404e83bbf0f931a4d06eb4af465b.
Included original Primer3 src and upstream LICENSE; compiler inputs are
src/oligotm_main.c and src/oligotm.c.
Emscripten SDK 3.1.61: https://github.com/emscripten-core/emsdk
emsdk tag 3.1.61 commit ca7b40ae222a2d8763b6ac845388744b0e57cfb7.
The build used releases-28e4a74b579b4157bda5fc34f23c7d3905a8bd6c.
Install and activate this SDK in an emsdk/ directory beside build-oligotm.sh,
then run bash build-oligotm.sh; no private sequences are needed for building.
WASM SHA-256 009545a8575c5142b48588a92ed128f59aa9f14546f96c58ba3b012ddab88cd4
Glue SHA-256 ff175993d0977c188f278fefa330b522ee3b714536df47bd9447f5e97a7246a7
Primer3 upstream states GPL v2 or later; its source LICENSE and individual
source-file notices are included. Downstream integrated application and
third-party license obligations should be reviewed separately.
Test references use primer3-py 2.2.0 and synthetic sequences only.
