gcc-4.8: fix ICE of cross-compile for PowerPC e500v2 targets

gcc-4.8: fix ICE of cross-compile for PowerPC e500v2 targets

  * http://gcc.gnu.org/bugzilla//show_bug.cgi?id=57717#c7

  * fix the segfault issue of dd on e500v2 targets
    Since double-float is disabled for e500v2 targets build due to ICE of gcc-4.8.1,
    accordingly %Ld format of sprintf is disabled.
    Address Bug 4910 - [p1022ds]urandom: segmentation fault

(From OE-Core rev: a4fefac26d91bc56d5d28e1c9973a189d2509d45)

Signed-off-by: Chunrong Guo <B40290@freescale.com>
Signed-off-by: Saul Wold <sgw@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>