ubuntu14.04下 openosom svn762 backfire_10.03 编译错误问题修正

./stdio.h:456:1: error: ‘gets’ undeclared here (not in a function) 

elf.cpp:68:5: error: '::close' has not been declared：

修改 ./build_dir/host/m4-1.4.15/lib/stdio.h 以及 ./build_dir/host/bison-2.4.3/lib/stdio.h 
注释掉分别为456行以及458行的_GL_WARN_ON_USE (gets, "gets is a security hole - use fgets instead");

修改 ./build_dir/host/mklibs/src/mklibs-readelf/elf.cpp 增加 #include <unistd.h>