Bump third_party/libwebsockets/repo from `c57c239` to `2d08ea5` #1490

Job	Run time
Test Suites - Linux (no-ble-no-shell-tsan-clang)	5m 27s
Test Suites - Darwin (no-ble-no-shell-tsan-clang)	44m 18s
Test Suites - Darwin (no-ble-no-shell-asan-clang)	41m 25s
REPL Tests - Linux	5m 36s
REPL Tests - Darwin	0s
	1h 36m 46s

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