xnn_table_exp2minus_k_over_16 extern as uint32_t instead of int #1304

Job	Run time
build-and-test / cmake-linux-aarch64	10m 12s
build-and-test / cmake-linux-armhf	11m 2s
build-and-test / cmake-linux-local	12m 54s
build-and-test / cmake-linux-riscv64	7m 59s
build-and-test / cmake-linux-riscv64-rvv	10m 50s
build-and-test / cmake-windows-arm64	7m 1s
build-and-test / cmake-windows-x64	9m 54s
build-and-test / cmake-windows-x86	10m 22s
build-and-test / bazel-linux-aarch64	10m 6s
build-and-test / bazel-linux-x86_64	15m 2s
build-and-test / bazel-linux-x86_64-gcc-9	8m 54s
build-and-test / cmake-android (build-android-arm64.sh)	10m 36s
build-and-test / cmake-ios-arm64	4m 48s
build-and-test / cmake-android (build-android-armv7.sh)	10m 0s
build-and-test / cmake-ios-x86_64	5m 43s
build-and-test / cmake-android (build-android-x86.sh)	12m 3s
build-and-test / cmake-macos-arm64	9m 11s
	2h 46m 37s

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