pi@raspberrypi:~ $ sudo dpkg -i --force-all libc6-dev_2.13-38+rpi2+deb7u11_armhf.deb
Selecting previously unselected package libc6-dev:armhf.
(Reading database ... 397 files and directories currently installed.)
Preparing to unpack libc6-dev_2.13-38+rpi2+deb7u11_armhf.deb ...
Unpacking libc6-dev:armhf (2.13-38+rpi2+deb7u11) ...
dpkg: libc6-dev:armhf: dependency problems, but configuring anyway as you requested:
 libc6-dev:armhf depends on libc6 (= 2.13-38+rpi2+deb7u11); however:
  Version of libc6:armhf on system is 2.19-18+deb8u7.
 libc6-dev:armhf depends on libc-dev-bin (= 2.13-38+rpi2+deb7u11); however:
  Package libc-dev-bin is not installed.
 libc6-dev:armhf depends on linux-libc-dev; however:
  Package linux-libc-dev is not installed.

Setting up libc6-dev:armhf (2.13-38+rpi2+deb7u11) ...
pi@raspberrypi:~ $