Deprecation warning relating to xcov

[xross]

The following warnings are emitted when running with xcov enabled.

================================================================================ warnings summary =================================================================================
../../Installs/Mac/lib/python/xcoverage/xcov.py:13
/Users/ross/sandboxes/sb_xud_view/Installs/Mac/lib/python/xcoverage/xcov.py:13: DeprecationWarning: invalid escape sequence [
'Loadable ([0-9]).tile[([0-9])] (node "([0-9])", tile ([0-9]*)'

../../Installs/Mac/lib/python/xcoverage/xcov.py:15
/Users/ross/sandboxes/sb_xud_view/Installs/Mac/lib/python/xcoverage/xcov.py:15: DeprecationWarning: invalid escape sequence \s
DISASM_RE = re.compile(".0x([0-9a-fA-F]): .: \s(\w*) (.*")

../../Installs/Mac/lib/python/xcoverage/xcov.py:16
/Users/ross/sandboxes/sb_xud_view/Installs/Mac/lib/python/xcoverage/xcov.py:16: DeprecationWarning: invalid escape sequence [
TRACE_RE = re.compile("tile[([0-9])]@([0-9]).--.-.([0-9a-fA-F]) ((.)) : (.)")

../../Installs/Mac/lib/python/xcoverage/xcov.py:49
/Users/ross/sandboxes/sb_xud_view/Installs/Mac/lib/python/xcoverage/xcov.py:49: DeprecationWarning: invalid escape sequence [
return re.split("[|]", proc.attrib["codeReference"])[1]