C example patch #418

Job	Run time
clippy	19s
build	5s
fmt	3s
mips64-rust-example-dynamic-memory	1m 17s
mips64-rust-example-hello-world	1m 17s
mips64-rust-example-timer	1m 23s
mips64-static-library	1m 21s
risc-v-esp32c6-rust-example-dynamic-memory	1m 22s
risc-v-esp32c6-rust-example-hello-world	1m 16s
risc-v-esp32c6-rust-example-timer	1m 23s
risc-v-esp32c6-rust-example-wifi	1m 21s
risc-v-esp32c6-static-library	1m 22s
test	12s
xtensa-esp32-rust-example-dynamic-memory	1m 44s
xtensa-esp32-rust-example-hello-world	1m 40s
xtensa-esp32-rust-example-timer	1m 38s
xtensa-esp32-static-library	1m 47s
xtensa-esp32-rust-example-wifi	1m 48s
xtensa-esp32-c-example	1m 6s
	22m 24s

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