BaseTools: Fix Python SyntaxWarning

- Windows paths must be escaped
- Regex should use raw strings

Signed-off-by: Tim Crawford <tcrawford@system76.com>

BaseTools/Scripts/PackageDocumentTools/plugins/EdkPlugins/basemodel/efibinary.py

@@ -528,7 +528,7 @@ class EfiSectionHeader(BinaryItem):
 
 
 
-rMapEntry = re.compile('^(\w+)[ \(\w\)]* \(BaseAddress=([0-9a-fA-F]+), EntryPoint=([0-9a-fA-F]+), GUID=([0-9a-fA-F\-]+)')
+rMapEntry = re.compile(r'^(\w+)[ \(\w\)]* \(BaseAddress=([0-9a-fA-F]+), EntryPoint=([0-9a-fA-F]+), GUID=([0-9a-fA-F\-]+)')
 class EfiFvMapFile(object):
     def __init__(self):
         self._mapentries = {}