Use "define" instead of "const" for natives macros

tools/js2c.py

Index: tools/js2c.py
diff --git a/tools/js2c.py b/tools/js2c.py
index 6a29fbe7f03eaa8e4b7d35d6d4b82406257591e7..1f1a81f875941c9df9b72142c54f92dab7a74d02 100755
--- a/tools/js2c.py
+++ b/tools/js2c.py
@@ -158,7 +158,7 @@ class PythonMacro:
       args.append(mapping[arg])
     return str(self.fun(*args))
 
-CONST_PATTERN = re.compile(r'^const\s+([a-zA-Z0-9_]+)\s*=\s*([^;]*);$')
+CONST_PATTERN = re.compile(r'^define\s+([a-zA-Z0-9_]+)\s*=\s*([^;]*);$')
 MACRO_PATTERN = re.compile(r'^macro\s+([a-zA-Z0-9_]+)\s*\(([^)]*)\)\s*=\s*([^;]*);$')
 PYTHON_MACRO_PATTERN = re.compile(r'^python\s+macro\s+([a-zA-Z0-9_]+)\s*\(([^)]*)\)\s*=\s*([^;]*);$')
 
@@ -240,7 +240,7 @@ def ExpandInlineMacros(lines):
     lines = ExpandMacroDefinition(lines, pos, name_pattern, macro, non_expander)
 
 
-INLINE_CONSTANT_PATTERN = re.compile(r'const\s+([a-zA-Z0-9_]+)\s*=\s*([^;\n]+)[;\n]')
+INLINE_CONSTANT_PATTERN = re.compile(r'define\s+([a-zA-Z0-9_]+)\s*=\s*([^;\n]+)[;\n]')
 
 def ExpandInlineConstants(lines):
   pos = 0