e2fsprogs: add posix_memalign related portability patch from #8508

SVN-Revision: 32112

tools/e2fsprogs/patches/005-posix_memalign.patch

@@ -0,0 +1,31 @@
+--- a/lib/ext2fs/ext2fs.h
++++ b/lib/ext2fs/ext2fs.h
+@@ -1212,7 +1212,26 @@
+ 
+ 	if (align == 0)
+ 		align = 8;
+-	if (retval = posix_memalign((void **) ptr, align, size)) {
++#ifdef HAVE_POSIX_MEMALIGN
++	retval = posix_memalign((void **)ptr, align, size);
++#else
++#ifdef HAVE_MEMALIGN
++    if ((*(void **)ptr = (void *)memalign(align, size)) == NULL)
++    	retval = errno;
++    else
++    	retval = 0;
++#else
++#ifdef HAVE_VALLOC
++    if ((*(void **)ptr = valloc(size)) == NULL)
++    	retval = errno;
++    else
++    	retval = 0;
++#else
++# error "Impossible to allocate aligned memory!"
++#endif /* HAVE_VALLOC */
++#endif /* HAVE_MEMALIGN */
++#endif /* HAVE_POSIX_MEMALIGN */
++	if (retval) {
+ 		if (retval == ENOMEM)
+ 			return EXT2_ET_NO_MEMORY;
+ 		return retval;
+--