Merge branch 'eclipse_unique_includes' into 'master'

eclipse: remove repeated entries in include paths for C/C++

See merge request ita1024/waf!2330

waflib/extras/eclipse.py

@@ -133,8 +133,10 @@ class eclipse(Build.BuildContext):
 					path = p.path_from(self.srcnode)
 
 					if (path.startswith("/")):
+						if path not in cpppath:
 							cpppath.append(path)
 					else:
+						if path not in workspace_includes:
 							workspace_includes.append(path)
 
 					if is_cc and path not in source_dirs: