support for std::endl and cout << ints

src/library.js

@@ -4320,6 +4320,16 @@ LibraryManager.library = {
     _fputs(str, _stdout); // XXX stderr etc.
   },
 
+  _ZNSt3__113basic_ostreamIcNS_11char_traitsIcEEElsEi__deps: ['fputs', '$libcxx'],
+  _ZNSt3__113basic_ostreamIcNS_11char_traitsIcEEElsEi: function(stream, num) {
+    _fputs(allocate(intArrayFromString(num.toString()), 'i8', ALLOC_STACK), _stdout);
+  },
+
+  _ZNSt3__113basic_ostreamIcNS_11char_traitsIcEEElsEPFRS3_S4_E__deps: ['fputc', '$libcxx'],
+  _ZNSt3__113basic_ostreamIcNS_11char_traitsIcEEElsEPFRS3_S4_E: function(stream, x) {
+    _fputc('\n'.charCodeAt(0), _stdout);
+  },
+
   // glibc
 
   _ZNSt8ios_base4InitC1Ev: function() {

system/include/libcxx/ostream

@@ -1181,6 +1181,7 @@ basic_ostream<_CharT, _Traits>::seekp(off_type __off, ios_base::seekdir __dir)
     return *this;
 }
 
+*/
 template <class _CharT, class _Traits>
 inline _LIBCPP_INLINE_VISIBILITY
 basic_ostream<_CharT, _Traits>&
@@ -1209,6 +1210,7 @@ flush(basic_ostream<_CharT, _Traits>& __os)
     return __os;
 }
 
+/*
 #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
 
 template <class _Stream, class _Tp>

tests/runner.py

@@ -3482,12 +3482,12 @@ at function.:blag
 
         int main()
         {
-          std::cout << "hello world";
+          std::cout << "hello world" << std::endl << 77 << "." << std::endl;
           return 0;
         }
       '''
 
-      self.do_run(src, 'hello world')
+      self.do_run(src, 'hello world\n77.\n')
 
     def test_stdvec(self):
       src = '''