Fix 'Build fails on aarch64-unknown-linux-android24'(#124)

[ChenPi11]

Benchmark:

--------------------------------------------------------------------------------------------- benchmark 'compress': 2 tests ----------------------------------------------------------------------------------------------
Name (time in ms)                                          Min                 Max                Mean             StdDev              Median                IQR            Outliers     OPS            Rounds  Iterations
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
test_benchmark_text_compress[PPMd H-7-6-16777216]     208.6208 (1.0)      277.4195 (1.0)      235.8811 (1.0)      28.3367 (1.0)      231.3216 (1.0)      44.7625 (1.0)           1;0  4.2394 (1.0)           5           1
test_benchmark_text_compress[PPMd I-8-8-8388608]      244.2492 (1.17)     362.0023 (1.30)     287.4594 (1.22)     49.3901 (1.74)     263.8437 (1.14)     73.7615 (1.65)          1;0  3.4788 (0.82)          5           1
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

---------------------------------------------------------------------------------------------- benchmark 'decompress': 2 tests -----------------------------------------------------------------------------------------------
Name (time in ms)                                            Min                 Max                Mean              StdDev              Median                 IQR            Outliers     OPS            Rounds  Iterations
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
test_benchmark_text_decompress[PPMd H-7-6-16777216]     185.6872 (1.0)      367.2979 (1.0)      244.0532 (1.0)       77.8981 (1.0)      197.9793 (1.0)      107.0395 (1.0)           1;0  4.0975 (1.0)           5           1
test_benchmark_text_decompress[PPMd I-8-8-8388608]      189.5612 (1.02)     522.2300 (1.42)     303.9971 (1.25)     129.2388 (1.66)     285.4922 (1.44)     131.8851 (1.23)          1;0  3.2895 (0.80)          5           1
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

[ChenPi11]

Replace pthread_cancel(tc->handle) to pthread_kill(tc->handle, SIGUSR1) can fix this problem. With all tests passed.>
But it seems unsafe.

We found that there is a probability for test tests/test_fuzzer.py::test_ppmd8_fuzzer to enter an infinite loop.

[miurahr]

I have merged main branch back to here.

[miurahr]

Suggested change

	#include <signal.h>
	#if defined(__ANDROID__) || defined(__BIONIC__) || defined(PPMD_NO_PTHREAD_CANCEL) || 1
	#if defined(__ANDROID__) || defined(__BIONIC__) || defined(PPMD_NO_PTHREAD_CANCEL)
	#include <signal.h>

Please do not brute force insert the change on all the platform.

[ChenPi11]

omg i forget to remove the 1💀

[miurahr]

Because we use pthread_cancel for the critical part of the pyppmd, replacing it with pthread_kill does not work properly.

ref

pyppmd/src/lib/buffer/ThreadDecoder.c

Lines 311 to 312 in 85a2281

	pthread_cancel(tc->handle);
	pthread_join(tc->handle, NULL);

I don't merge here other than the case when you implement pthread_cancel for your interested platform.

FYI: We use the windows implementation of pthread_cancel.