Bug#1017588: Your autotools copyright question

Copyright info from these two files is missing:

libdrgn/arch_ppc64.c
libdrgn/kdump.c

Reply to:

References:
- Bug#1011368: RFS: libkdumpfile/0.4.1-1 [ITP] -- Python bindings for libkdumpfile9
  - From: Bastian Germann <bage@debian.org>
- Bug#1011368: RFS: libkdumpfile/0.4.1-1 [ITP] -- Python bindings for libkdumpfile9
  - From: Michel Alexandre Salim <michel@michel-slm.name>
- Bug#1011368: RFS: libkdumpfile/0.4.1-1 [ITP] -- Python bindings for libkdumpfile9
  - From: Bastian Germann <bage@debian.org>
- Bug#1011368: RFS: libkdumpfile/0.4.1-1 [ITP] -- Python bindings for libkdumpfile9
  - From: Michel Alexandre Salim <michel@michel-slm.name>
- Bug#1011368: RFS: libkdumpfile/0.4.1-1 [ITP] -- Python bindings for libkdumpfile9
  - From: Bastian Germann <bage@debian.org>
- Bug#1011368: RFS: libkdumpfile/0.4.1-1 [ITP] -- Python bindings for libkdumpfile9
  - From: Michel Alexandre Salim <michel@michel-slm.name>
- Bug#1017588: RFS: drgn/0.0.20-1 [ITP] -- Programmable debugger
  - From: Michel Alexandre Salim <michel@michel-slm.name>
- Bug#1017588: Your autotools copyright question
  - From: Bastian Germann <bage@debian.org>
- Bug#1017588: Your autotools copyright question
  - From: Michel Alexandre Salim <michel@michel-slm.name>