More work on windows locking. Fix some problems with unix locking. There

is still an assertion failure on windows locking in attach2.test. (CVS 1539)

FossilOrigin-Name: 0c2d169cf3c0f36972015c952a2b46cb9a333881

src/printf.c

@@ -810,7 +810,8 @@ void sqlite3DebugPrintf(const char *zFormat, ...){
   va_start(ap, zFormat);
   base_vprintf(0, 0, zBuf, sizeof(zBuf), zFormat, ap);
   va_end(ap);
-  fprintf(stderr,"%s", zBuf);
+  fprintf(stdout,"%s", zBuf);
+  fflush(stdout);
 }
 #endif