howto:add an article about how to analysis the crash dump created by breakpad

howto/how to use breadpad crash analysis.md

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+Introduction
+----------------------
+
+Goldendict-ng has provide an option to build the application with [breakpad](https://docs.sentry.io/platforms/native/guides/breakpad/)
+
+`CONFIG+=use_breakpad` to enable this feature.
+
+
+Currently only Windows xapian has built with breakpad support.
+
+How to analyze the dump created by breakpad.
+------------
+
+When a crash is encountered, a dump file is generated under the folder `crash`.Take the dump file as `a.dmp` for following example.
+
+1. `dump_syms.exe GoldenDict.pdb > GoldenDict.sym`
+The content of GoldenDict.sym is like this:
+```
+MODULE windows x86_64 904B2C52C1EC411D9D0271445CAD6DCD2 GoldenDict.pdb
+INFO CODE_ID 645510C96CC000 GoldenDict.exe
+```
+2. create a folder such as `symbols`  and a series of folders like this:
+```
+GoldDict.exe
+a.dmp                 (A)
+symbols
+└─GoldenDict.pdb    (B)
+    └─904B2C52C1EC411D9D0271445CAD6DCD2   (C)
+         └─GoldenDict.sym
+```
+- `A`   this is the dump file
+- `B`   this is a folder name
+- `C`   this folder takes the name from the first line of `GoldenDict.sym` file
+
+
+3. anlaysis the dump file like this
+```
+minidump_stackwalk.exe  -s a.dmp symbols > a.txt
+```
+4.  check the a.txt file to find the possible crash reason. usually it will point to the actual crash line number of the source code.
+
+Note
+------------
+The tools can be downloaded from [minidump-tools](https://gitee.com/wabwh/breakpad-minindump-tools/tree/master/)