move memory initializer pattern to shared

emcc

@@ -1622,7 +1622,7 @@ try:
           if os.path.abspath(memfile) != os.path.abspath(memfile):
             shutil.copyfile(memfile, temp_memfile)
         return 'loadMemoryInitializer("%s");' % os.path.basename(memfile)
-      src = re.sub('/\* memory initializer \*/ allocate\(([\d,\.concat\(\)\[\]\\n ]+)"i8", ALLOC_NONE, Runtime\.GLOBAL_BASE\)', repl, src, count=1)
+      src = re.sub(shared.JS.memory_initializer_pattern, repl, src, count=1)
       open(final + '.mem.js', 'w').write(src)
       final += '.mem.js'
       js_transform_tempfiles[-1] = final # simple text substitution preserves comment line number mappings

emlink.py

@@ -56,6 +56,7 @@ class AsmModule():
     # heap initializer TODO
 
     # global initializers TODO
+    shared.JS.memory_initializer_pattern
 
     # imports
     main_imports = set(main.imports)

tools/shared.py

@@ -1351,6 +1351,8 @@ JCache = cache.JCache(Cache)
 chunkify = cache.chunkify
 
 class JS:
+  memory_initializer_pattern = '/\* memory initializer \*/ allocate\(([\d,\.concat\(\)\[\]\\n ]+)"i8", ALLOC_NONE, Runtime\.GLOBAL_BASE\)'
+
   @staticmethod
   def to_nice_ident(ident): # limited version of the JS function toNiceIdent
     return ident.replace('%', '$').replace('@', '_');