crypto/internal/fips140/entropy: increase AllocsPerRun iterations

TestNISTECAllocations is flaky (~1% failure rate) on my local Windows
machine since CL 710058, which touched TestEntropyRace.

These tests are unrelated, but some allocations might be incorrectly
accounted to TestNISTECAllocations, affecting the end result due to
the low number of iterations done in that test.

Change-Id: I01323c2a45b12665e86d940467f4f91c2e66696b
Reviewed-on: https://go-review.googlesource.com/c/go/+/712620
Reviewed-by: David Chase <drchase@google.com>
Reviewed-by: Roland Shoemaker <roland@golang.org>
Auto-Submit: Quim Muntal <quimmuntal@gmail.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>

Author: qmuntal

src/crypto/internal/fips140test/nistec_test.go

@@ -18,7 +18,7 @@ import (
 func TestNISTECAllocations(t *testing.T) {
 	cryptotest.SkipTestAllocations(t)
 	t.Run("P224", func(t *testing.T) {
-		if allocs := testing.AllocsPerRun(10, func() {
+		if allocs := testing.AllocsPerRun(100, func() {
 			p := nistec.NewP224Point().SetGenerator()
 			scalar := make([]byte, 28)
 			rand.Read(scalar)
@@ -37,7 +37,7 @@ func TestNISTECAllocations(t *testing.T) {
 		}
 	})
 	t.Run("P256", func(t *testing.T) {
-		if allocs := testing.AllocsPerRun(10, func() {
+		if allocs := testing.AllocsPerRun(100, func() {
 			p := nistec.NewP256Point().SetGenerator()
 			scalar := make([]byte, 32)
 			rand.Read(scalar)
@@ -56,7 +56,7 @@ func TestNISTECAllocations(t *testing.T) {
 		}
 	})
 	t.Run("P384", func(t *testing.T) {
-		if allocs := testing.AllocsPerRun(10, func() {
+		if allocs := testing.AllocsPerRun(100, func() {
 			p := nistec.NewP384Point().SetGenerator()
 			scalar := make([]byte, 48)
 			rand.Read(scalar)
@@ -75,7 +75,7 @@ func TestNISTECAllocations(t *testing.T) {
 		}
 	})
 	t.Run("P521", func(t *testing.T) {
-		if allocs := testing.AllocsPerRun(10, func() {
+		if allocs := testing.AllocsPerRun(100, func() {
 			p := nistec.NewP521Point().SetGenerator()
 			scalar := make([]byte, 66)
 			rand.Read(scalar)

src/crypto/internal/fips140test/xaes_test.go

@@ -21,7 +21,7 @@ func TestXAESAllocations(t *testing.T) {
 		t.Skip("Test reports non-zero allocation count. See issue #70448")
 	}
 	cryptotest.SkipTestAllocations(t)
-	if allocs := testing.AllocsPerRun(10, func() {
+	if allocs := testing.AllocsPerRun(100, func() {
 		key := make([]byte, 32)
 		nonce := make([]byte, 24)
 		plaintext := make([]byte, 16)