GCCE fixes (Bug 2971) : Remove IMPORT_C statements in ext_dat.h as these are not necessary within same module and cause "not constant" error with GCCE
"g_cclosure_marshal_VOID__VOID",
"g_cclosure_marshal_VOID__BOOLEAN",
"g_cclosure_marshal_VOID__CHAR",
"g_cclosure_marshal_VOID__UCHAR",
"g_cclosure_marshal_VOID__INT",
"g_cclosure_marshal_VOID__UINT",
"g_cclosure_marshal_VOID__LONG",
"g_cclosure_marshal_VOID__ULONG",
"g_cclosure_marshal_VOID__ENUM",
"g_cclosure_marshal_VOID__FLAGS",
"g_cclosure_marshal_VOID__FLOAT",
"g_cclosure_marshal_VOID__DOUBLE",
"g_cclosure_marshal_VOID__STRING",
"g_cclosure_marshal_VOID__PARAM",
"g_cclosure_marshal_VOID__BOXED",
"g_cclosure_marshal_VOID__POINTER",
"g_cclosure_marshal_VOID__OBJECT",
"g_cclosure_marshal_VOID__UINT_POINTER",
"g_cclosure_marshal_BOOL__FLAGS",
"g_cclosure_marshal_STRING__OBJECT_POINTER",