Add .editorconfig

Change-Id: Ic9d295f5e9e51c6aee21364385f226a86114c180

.editorconfig

@@ -0,0 +1,28 @@
+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+insert_final_newline = true
+
+[*.{cpp,hpp}]
+indent_style = space
+indent_size = 2
+trim_trailing_whitespace = true
+
+[{*.{py,sh},.jenkins,wscript}]
+indent_style = space
+indent_size = 4
+trim_trailing_whitespace = true
+
+[*.md]
+indent_style = space
+trim_trailing_whitespace = false
+
+[*.rst]
+indent_style = space
+trim_trailing_whitespace = true
+
+[*.{yaml,yml}]
+indent_style = space
+indent_size = 2