libziparchive: fix fallocate failures

The objective of fallocate call seems to be to
make sure that we have enough enough space left
in the disk to house the uncompressed file.
But, fallocate is only supported in the following
file systems:
btrfs, ext4, ocfs2, and xfs

Return error only when fallocate fails due to
lack of space. The immediate ftruncate call is
going to take of the majority of other errors.

Bug: 21561449
Change-Id: I7083f3c7e5d745bd6e8a190ac9020297d638d9d4