Add minidump_generator library to nacl_core_sdk
Add minidump_generator library to nacl_core_sdk

Also added nacl_exception library, it is used by minidump_generator.

BUG=https://code.google.com/p/chromium/issues/detail?id=242561
R=mseaborn@chromium.org

Review URL: https://codereview.chromium.org/15306004

git-svn-id: 721b910a23eff8a86f00c8fd261a7587cddf18f8@11378 fcba33aa-ac0c-11dd-b9e7-8d5594d729c2

sbc100/native_client,sbc100/native_client,sbc100/native_client,sbc100/native_client,sbc100/native_client,sbc100/native_client