Mark the embedded C main() function in the embedding test as "extern C" in C++...

Mark the embedded C main() function in the embedding test as "extern C" in C++ to see if that fixes the C++ builds in MSVC.

docs/examples/tutorial/embedding/embedded_main.c

@@ -3,6 +3,10 @@
 /* This include file is automatically generated by Cython for 'public' functions. */
 #include "embedded.h"
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 int
 main(int argc, char *argv[])
 {
@@ -59,3 +63,7 @@ exit_with_error:
     Py_Finalize();
     return 1;
 }
+
+#ifdef __cplusplus
+}
+#endif

tests/windows_bugs.txt

@@ -31,6 +31,3 @@ cpp_template_subclasses
 
 # MSVC lacks "complex.h"
 complex_numbers_cmath_T2891
-
-# Embedding seems to have a non-trivial setup on Windows
-embedded