Use SVC_LOCK macros in ganesha_rpc.h.

Previously, we were using ntirpc duplex locking primitives
explicitly, which was deprecated.

Signed-off-by: Matt Benjamin <matt@linuxbox.com>
Update ntirpc submodule.

Take SVC_LOCK fixes.

Signed-off-by: Matt Benjamin <matt@linuxbox.com>
Support GNU Gold Linker

Gold is supposed to be drop-in compatible, but the version in
Ubuntu 12.04 doesn't accept "--warn-once."

Signed-off-by: Matt Benjamin <matt@linuxbox.com>
Signed-off-by: Adam C. Emerson <aemerson@linuxbox.com>
Fix uninitialized variable warning

Signed-off-by: Adam C. Emerson <aemerson@linuxbox.com>