libarchive: Update to version 3.6.1

libarchive: Update to version 3.6.1

- Update from version 3.6.0 to 3.6.1
- Update of rootfile
- Changelog
	Libarchive 3.6.1 is a bugfix and security release.
	  Security fixes:
	    7zip reader: fix PPMD read beyond boundary (#1671)
	    ZIP reader: fix possible out of bounds read (OSS-Fuzz 38766 #1672)
	    ISO reader: fix possible heap buffer overflow in read_children() (OSS-Fuzz 38764, #1685)
	    RARv4 redaer: fix multiple issues in RARv4 filter code (introduced in libarchive 3.6.0)
	        fix heap use after free in archive_read_format_rar_read_data() (OSS-Fuzz 44547, 52efa50)
	        fix null dereference in read_data_compressed() (OSS-Fuzz 44843, 1271f77)
	        fix heap user after free in run_filters() (OSS-Fuzz 46279, #1715)

Signed-off-by: Adolf Belka <adolf.belka@ipfire.org>
Reviewed-by: Peter Müller <peter.mueller@ipfire.org>