Linux 2.7 Open Source Gold Release

Added a command option “-resign” for Signing Tool.
Split the header file of Un-trusted Architecture Services.
Supported Red Hat* Enterprise Linux* Server 8.0 (for x86_64). And we do not support
Red Hat* Enterprise Linux* Server 7.6 (for x86_64) from this release
Added support for new version Intel(R) Provisioning Certification Server interfaces.
Added new libraries libsgx_epid.so, libsgx_launch.so, libsgx_platform.so and libsgx_quote_ex.so
Fixed bugs.

Signed-off-by: Zhang Lili Z [email protected]