runtime: disable TestSegv in race mode

This was just enabled in CL 643897. It seems to work fine on Linux, but
there are traceback issues on Darwin. We could disable just on Darwin,
but I'm not sure SIGSEGV inside of TSAN is something we care to support.

Fixes #73784.

Cq-Include-Trybots: luci.golang.try:gotip-darwin-arm64-race
Change-Id: I6a6a636cb15d7affaeb22c4c13d8f2a5c9bb31fd
Reviewed-on: https://go-review.googlesource.com/c/go/+/674276
LUCI-TryBot-Result: Go LUCI <[email protected]>
Reviewed-by: Michael Knyszek <[email protected]>
Auto-Submit: Michael Pratt <[email protected]>

Author: prattmic

src/runtime/crash_cgo_test.go

@@ -659,8 +659,8 @@ func TestSegv(t *testing.T) {
 	case "plan9", "windows":
 		t.Skipf("no signals on %s", runtime.GOOS)
 	}
-	if asan.Enabled || msan.Enabled {
-		t.Skip("skipping test on ASAN/MSAN: triggers SIGSEGV in sanitizer runtime")
+	if race.Enabled || asan.Enabled || msan.Enabled {
+		t.Skip("skipping test on race/ASAN/MSAN: triggers SIGSEGV in sanitizer runtime")
 	}
 
 	for _, test := range []string{"Segv", "SegvInCgo", "TgkillSegv", "TgkillSegvInCgo"} {