foss-for-synopsys-dwc-arc-processors/toolchain

Bump GCC to the most recent version 14.1

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GCC v14 brings a host of new features and improvements of many areas. Of our special interest is implementation of the long list of RISC-V extensions, including code-size reduction instructions (Zc, Zca, Zcb, Zcmp, Zcmt, etc.), vector instructions (RVV) and many others.

See announce here: https://lists.gnu.org/archive/html/info-gnu/2024-05/msg00002.html and the changelog here: https://gcc.gnu.org/gcc-14/changes.html.

The latest GCC 14 is stored in GCC repository in arc-2024.06 branch. Release commit: foss-for-synopsys-dwc-arc-processors/gcc@cd0059a.