fix(Thread_POSIX): qnx build error: 'prctl' was not declared in this … #1802

Job	Run time
android-arm64-v8a-ndk-latest-cmake	7m 9s
linux-emscripten-cmake	4m 39s
android-arm64-v8a-ndk-cmake	5m 22s
android-armeabi-v7a-ndk-cmake	5m 37s
linux-gcc-cmake	16m 16s
linux-gcc-make	20m 17s
linux-gcc-make-asan	25m 38s
linux-gcc-make-asan-no-soo	25m 13s
linux-gcc-make-cross-armhf	13m 19s
linux-gcc-make-cxx20	24m 10s
linux-gcc-make-ubsan	31m 45s
linux-gcc-make-tsan	21m 54s
linux-gcc-make-mysql	6m 40s
macos-clang-cmake-openssl	31m 45s
macos-clang-cmake-openssl3	31m 9s
macos-clang-cmake-openssl3-visibility-hidden	32m 38s
macos-clang-make	25m 27s
macos-clang-make-openssl3-asan	26m 6s
macos-clang-make-openssl3-tsan	34m 44s
macos-clang-make-openssl3-ubsan	31m 29s
macos-clang-make-visibility-hidden	33m 58s
windows-2022-msvc-buildwin-x64	32m 26s
windows-2022-msvc-cmake	21m 59s
linux-gcc-make-odbc	11m 56s
linux-gcc-make-postgres	6m 32s
linux-gcc-make-mongodb	6m 45s
linux-gcc-make-redis	6m 33s
	9h 1m 26s

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