Import .gitignore file.

This fix the status returned by 'git status' by removing files that
have not to be added to repository.

Signed-off-by: Eric Leblond <eric@regit.org>

.gitignore

@@ -0,0 +1,36 @@
+*.o
+*.lo
+*.in
+*.[ch]e
+Makefile
+.deps/
+.libs/
+*~
+m4/
+TAGS
+aclocal.m4
+autom4te.cache/
+config.guess
+config.h
+config.log
+config.status
+config.sub
+configure
+libhtp/TAGS
+libhtp/aclocal.m4
+libhtp/autom4te.cache/
+libhtp/config.h
+libhtp/config.log
+libhtp/config.status
+libhtp/configure
+libhtp/htp.pc
+libhtp/htp/TAGS
+libhtp/htp/libhtp.la
+libhtp/libtool
+libhtp/stamp-h1
+libhtp/test/TAGS
+libtool
+ltmain.sh
+src/TAGS
+src/suricata
+stamp-h1