ARROW-15944: [Docs][C++]Document dependencies for building on Arch Linux
ARROW-15944: [Docs][C++]Document dependencies for building on Arch Linux

Closes #12640 from zagto/arch-instructions

Authored-by: Tobias Zagorni <059b8b880f8441509ec8a65b50b4c6ae74ebea76@zagorni.eu>
Signed-off-by: Sutou Kouhei <73218711cdd5d5c30ac66da3cc4d9d9204caf34b@clear-code.com>

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