Don't link stdc++ when using bundled libbrotli

Signed-off-by: James Hilliard <james.hilliard1@gmail.com>

Author: jameshilliard

src/brotlicffi/_build.py

@@ -11,8 +11,8 @@
 else:
     libraries = ['brotlienc', 'brotlidec']
 
-if 'win32' not in str(sys.platform).lower():
-    libraries.append('stdc++')
+    if 'win32' not in str(sys.platform).lower():
+        libraries.append('stdc++')
 
 
 ffi.set_source(