* x86-64-linux-tdep.c: Tweak comment.

* x86-64-linux-tdep.c: Tweak comment.
(amd64_linux_supply_gregset): Renamed from
x86_64_linux_supply_gresget.
(amd64_linux_fill_gregset): Renamed from
x86_64_linux_fill_gregset.
(fetch_core_registers): Adjust for renamed functions.
(amd64_core_fns): Renamed from x86_64_core_fns.
(amd64_linux_sigtramp_start): Renamed from
x86_64_linux_sigtramp_start.
(amd64_linux_pc_in_sigtramp): Renamed from
x86_64_linux_pc_in_sigtramp.  Adjust for renamed functions.
(AMD64_LINUX_UCONTEXT_SIGCONTEXT_OFFSET): Renamed from
X86_64_LINUX_UCONTEXT_SIGCONTEXT_OFFSET.
(amd64_linux_sigcontext_addr): Renamed from
x86_64_linux_sigcontext_addr.
(amd64_linux_sc_reg_offset): Renamed from
x86_64_linux_sc_reg_offset.
(amd64_linux_init_abi): Renamed from x86_64_linux_init_abi.
Adjust for renamed functions and variables.
(_initialize_amd64_linux_tdep): Renamed from
_initialize_x86_64_linux_tdep.  Adjust for renamed functions and
variables.
* x86-64-linux-tdep.h: Update copyright year.  Tweak comment.
Adjust for renamed functions.