file command on RHEL6 can't find executable name in Power/Linux core files

Issue

• The core file format is slightly different (the executable name appears later in the dump), and "file" command doesn't know how to get to it.

• on RHEL6:

 $ file ./core_crashme.tsk_linux_x86
./core_crashme.tsk_linux_x86: ELF 32-bit LSB core file Intel 80386, version 1 
(SYSV), SVR4-style, from './crashme.tsk'

$ file ./core_crashme.tsk_linux_ppc64
./core_crashme.tsk_linux_ppc64: ELF 32-bit MSB core file, PowerPC or cisco 4500,
 version 1 (SYSV), SVR4-style

• Note that lack of a ", from xxxx" field in the ppc64 output.

• On RHEL5 it all works:

 $ file ./core_crashme.tsk_linux_ppc64

./core_crashme.tsk_linux_ppc64: ELF 32-bit MSB core file, PowerPC or cisco 4500,
 version 1 (SYSV), SVR4-style, from 'crashme.tsk'