tsan: filter out more bogus fd values

people do close(sysconf(_SC_OPEN_MAX)) after fork, where _SC_OPEN_MAX=1200000.

llvm-svn: 195645

compiler-rt/lib/tsan/rtl/tsan_fd.cc

@@ -44,7 +44,7 @@ static FdContext fdctx;
 
 static bool bogusfd(int fd) {
   // Apparently a bogus fd value.
-  return fd < 0 || fd >= (1 << 30);
+  return fd < 0 || fd >= kTableSize;
 }
 
 static FdSync *allocsync() {