rom: add libgcc runtime

[antmak]

rebase and merge after #14

The compiler on some platforms, with certain optimizations, might generate code that uses these functions

For example, got issue

undefined reference to `__bswapsi2'

on simple code

((rdid & 0xff) << 16) | (rdid & 0xff00) | ((rdid & 0xff0000) >> 16);

Xtensa GCC 14 -Os generates code that uses __bswapsi2 that is placed in ROM.

[github-actions]

Warnings

⚠️

Some issues found for the commit messages in this PR: the commit message "rom: add compiler runtime": body's lines must not be longer than 100 characters type/action should be one of [change, ci, docs, feat, fix, refactor, remove, revert, test] Please fix these commit messages - here are some basic tips: follow Conventional Commits style correct format of commit message should be: <type/action>(<scope/component>): <summary>, for example fix(esp32): Fixed startup timeout issue allowed types are: change,ci,docs,feat,fix,refactor,remove,revert,test sufficiently descriptive message summary should be between 20 to 72 characters and start with upper case letter avoid Jira references in commit messages (unavailable/irrelevant for our customers) TIP: Install pre-commit hooks and run this check when committing (uses the Conventional Precommit Linter).

	Messages
📖	This PR seems to be quite large (total lines of code: 1135), you might consider splitting it into smaller PRs

👋 Hello antmak, we appreciate your contribution to this project!

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[erhankur]

LGTM