remove redefined flags

_FILE_OFFSET_BITS, _LARGEFILE64_SOURCE and _GNU_SOURCE should have been
defined in config.h if necessary.

Signed-off-by: You-Sheng Yang <vicamo@gmail.com>
libzipfile: fix -Werror=unused-result

Signed-off-by: You-Sheng Yang <vicamo@gmail.com>
reorder definitions in Makefile.am for more libs to come

Signed-off-by: You-Sheng Yang <vicamo@gmail.com>
build mincrypt, sparse, zipfile libraries

Signed-off-by: You-Sheng Yang <vicamo@gmail.com>
build libdiskconfig

Signed-off-by: You-Sheng Yang <vicamo@gmail.com>
build libnetutils

Signed-off-by: You-Sheng Yang <vicamo@gmail.com>
build libsuspend

Signed-off-by: You-Sheng Yang <vicamo@gmail.com>
build libusbhost

Signed-off-by: You-Sheng Yang <vicamo@gmail.com>