C-example on risc-v architecture #423

Job	Run time
clippy	6s
fmt	7s
build	14s
mips64-rust-example-dynamic-memory	1m 18s
mips64-rust-example-hello-world	1m 24s
mips64-rust-example-timer	1m 20s
mips64-static-library	1m 17s
prepare-image	1s
test	14s
risc-v-esp32c6-rust-example-timer	2m 17s
risc-v-esp32c6-rust-example-dynamic-memory	1m 48s
risc-v-esp32c6-rust-example-wifi	1m 49s
xtensa-esp32-rust-example-dynamic-memory	1m 43s
risc-v-esp32c6-rust-example-hello-world	1m 44s
xtensa-esp32-rust-example-hello-world	1m 42s
risc-v-esp32c6-static-library	1m 52s
xtensa-esp32-rust-example-timer	1m 49s
xtensa-esp32-rust-example-wifi	1m 48s
xtensa-esp32-static-library	1m 53s
risc-v-esp32c6-c-example	1m 2s
xtensa-esp32-c-example	1m 6s
	26m 34s

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