1. Add the .gitignore file.
2. Add -Wall compile flag for libfsocket.so.
3. Use the '/* ... */' instead of multile "//" to comment out the multiple macro lines.
   The latter one will causes compile warning.
4. Use table instead of space in the libsocket.c to keep the unified coding style.
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Signed-off-by: Xiaofeng Lin <jerrylin.lxf@gmail.com>