Add wasm build instructions and fdtd3dbench target with predefined co… #47

Job	Run time
Unit test riscv64 ubuntu 22.04 for layout	3h 1m 9s
Unit test riscv64 ubuntu 22.04 for layout	2h 58m 59s
Unit test riscv64 ubuntu 22.04 for layout	3h 0m 9s
Unit test riscv64 ubuntu 22.04 for layout	2h 59m 52s
Unit test riscv64 ubuntu 22.04 for internalscheme	51m 17s
Unit test riscv64 ubuntu 22.04 for internalscheme	48m 32s
Unit test riscv64 ubuntu 22.04 for internalscheme	51m 14s
Unit test riscv64 ubuntu 22.04 for internalscheme	47m 14s
Unit test riscv64 ubuntu 22.04 for grid	8m 38s
Unit test riscv64 ubuntu 22.04 for dumpers-loaders	12m 35s
Unit test riscv64 ubuntu 22.04 for coordinate	8m 0s
Unit test riscv64 ubuntu 22.04 for settings	7m 57s
Unit test riscv64 ubuntu 22.04 for approximation	8m 48s
Unit test riscv64 ubuntu 22.04 for complex	7m 35s
	16h 11m 59s

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