chore: Change loong64 architecture gcc version

[wojiushixiaobai]

[rvagg]

What is this fixing? Is it currently broken?
Node.js currently requires 12 so going backward would seem like a bad idea: https://github.com/nodejs/node/blob/main/BUILDING.md#supported-toolchains

[wojiushixiaobai]

@rvagg
Doesn't work on some older systems, modified to the same version as riscv64.

• https://github.com/nodejs/unofficial-builds/blob/main/recipes/riscv64/Dockerfile#L16
• https://github.com/nodejs/unofficial-builds/blob/main/recipes/riscv64/run.sh#L20-L21

Maybe we can configure it according to the gcc version requirements of node.

# run.sh
MAJOR_VERSION=$(echo ${fullversion} | cut -d . -f 1 | tr --delete v)

export CC_host="ccache gcc-12"
export CXX_host="ccache g++-12"

if [ $MAJOR_VERSION -lt 22 ]; then
  export CC_host="ccache gcc-10"
  export CXX_host="ccache g++-10"
fi

if [ $MAJOR_VERSION -lt 20 ]; then
  export CC_host="ccache gcc-8"
  export CXX_host="ccache g++-8"
fi