Fix BUG: The SIGSYS and SIGSTOP are not supported in windows platform

[flycash]

What this PR does:
The SIGSYS and SIGSTOP are not supported in the Windows platform, so we should define the signals we catch on different platforms.
Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

[codecov-io]

Codecov Report

Merging #262 into develop will decrease coverage by 0.78%.
The diff coverage is 12.5%.

@@             Coverage Diff             @@
##           develop     #262      +/-   ##
===========================================
- Coverage    66.33%   65.54%   -0.79%     
===========================================
  Files          111      111              
  Lines         7042     7038       -4     
===========================================
- Hits          4671     4613      -58     
- Misses        1912     1969      +57     
+ Partials       459      456       -3

Impacted Files	Coverage Δ
config/graceful_shutdown.go	58.62% <12.5%> (-0.72%)	⬇️
protocol/dubbo/pool.go	57.86% <0%> (-15.74%)	⬇️
protocol/dubbo/listener.go	51.19% <0%> (-10.72%)	⬇️
protocol/dubbo/codec.go	76.47% <0%> (-5.89%)	⬇️
config_center/apollo/impl.go	84.41% <0%> (-2.6%)	⬇️
protocol/dubbo/readwriter.go	67.9% <0%> (-2.47%)	⬇️

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[hxmhlt]

LGTM

[kimmking]

To be fixing bug should create a related issue first.