package.bbclass: use single quotes for path passed to file in isELF()
Apparently there are recipes in the wild which generate files with
filenames containing '$' characters - which cause errors during
packaging.
Instead of adding another special case to escape '$' characters when
constructing the command passed to oe.utils.getstatusoutput(), switch
to using single quotes to quote the path - and therefore make isELF()
consistent with the way filenames and paths are quoted by every other
caller of oe.utils.getstatusoutput() in oe-core.
Signed-off-by: Andre McCurdy <armccurdy@gmail.com> Signed-off-by: Ross Burton <ross.burton@intel.com>
