Fixed Bug #66987 Memory corruption in fileinfo ext (bigendian)

On little endian:
	map->p == php_magic_database
	map->magic[i] = pointer into the map

	map->p == NULL
	map->magic[i] = pointer to allocated memory

On big endian (ppc64, s390x, ...):
	map->p != php_magic_database and map->p != NULL
        map->magic[i] = pointer into a copy of the map

Trying to efree pointer in the later cause memory corruption
Thanks to dkatulek / Red Hat for the report.
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added test for bug #53965
updated NEWS
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Fix Bug #66736 	fpassthru broken
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Fixed bug #66084 simplexml_load_string() mangles empty node name