ranchu: Fix goldfish_pipe definitions.

For the ranchu platform, the /dev/qemu_pipe device was renamed
to /dev/goldfish_pipe. Unfortunately, the ranchu configuration files
thought it was /dev/android_pipe.

This patch fixes this, which is necessary to get GPU emulation working
with qenu-android.

Change-Id: I45e6b60a1f42876f6df2b5a0dfe07d43435468e7
Merge "ranchu: Fix goldfish_pipe definitions."