credential.c

When packagelistparser was moved from frameworks/base/libs to system/core it
was never renamed in-line with things in system/core. Libs start with lib,
executables or subdirs do not.

For example, libusb versus logwrapper show the lib versus executable naming
split.

Change-Id: Ia1ed404347927ecfc2d037c83b2fe2a68b3966ba
Signed-off-by: William Roberts <william.c.roberts@intel.com>