crypto/x509: fix Windows build.

Windows is building a chain to the AddTrust root which is different
from the native Go code and causing a build failure.

This change alters the test so that both should build to the AddTrust
root.

R=bradfitz

LGTM=bradfitz
R=golang-codereviews, bradfitz
CC=golang-codereviews
https://golang.org/cl/87570044

src/pkg/crypto/x509/verify_test.go

@@ -213,8 +213,8 @@ var verifyTests = []verifyTest{
 		// Check that SHA-384 intermediates (which are popping up)
 		// work.
 		leaf:          moipLeafCert,
-		intermediates: []string{comodoIntermediateSHA384},
-		roots:         []string{comodoRSARoot},
+		intermediates: []string{comodoIntermediateSHA384, comodoRSAAuthority},
+		roots:         []string{addTrustRoot},
 		currentTime:   1397502195,
 		dnsName:       "api.moip.com.br",
 
@@ -223,6 +223,7 @@ var verifyTests = []verifyTest{
 				"api.moip.com.br",
 				"COMODO RSA Extended Validation Secure Server CA",
 				"COMODO RSA Certification Authority",
+				"AddTrust External CA Root",
 			},
 		},
 	},
@@ -1062,7 +1063,7 @@ jwLI5jqmBNFI+8NKAnb9L9K8E7bobTQk+p0pisehKxTxlgBzuRPpwLk6R1YCcYAn
 pLwltum95OmYdBbxN4SBB7SC
 -----END CERTIFICATE-----`
 
-const comodoRSARoot = `-----BEGIN CERTIFICATE-----
+const comodoRSAAuthority = `-----BEGIN CERTIFICATE-----
 MIIFdDCCBFygAwIBAgIQJ2buVutJ846r13Ci/ITeIjANBgkqhkiG9w0BAQwFADBv
 MQswCQYDVQQGEwJTRTEUMBIGA1UEChMLQWRkVHJ1c3QgQUIxJjAkBgNVBAsTHUFk
 ZFRydXN0IEV4dGVybmFsIFRUUCBOZXR3b3JrMSIwIAYDVQQDExlBZGRUcnVzdCBF
@@ -1094,3 +1095,29 @@ B5a6SE2Q8pTIqXOi6wZ7I53eovNNVZ96YUWYGGjHXkBrI/V5eu+MtWuLt29G9Hvx
 PUsE2JOAWVrgQSQdso8VYFhH2+9uRv0V9dlfmrPb2LjkQLPNlzmuhbsdjrzch5vR
 pu/xO28QOG8=
 -----END CERTIFICATE-----`
+
+const addTrustRoot = `-----BEGIN CERTIFICATE-----
+MIIENjCCAx6gAwIBAgIBATANBgkqhkiG9w0BAQUFADBvMQswCQYDVQQGEwJTRTEU
+MBIGA1UEChMLQWRkVHJ1c3QgQUIxJjAkBgNVBAsTHUFkZFRydXN0IEV4dGVybmFs
+IFRUUCBOZXR3b3JrMSIwIAYDVQQDExlBZGRUcnVzdCBFeHRlcm5hbCBDQSBSb290
+MB4XDTAwMDUzMDEwNDgzOFoXDTIwMDUzMDEwNDgzOFowbzELMAkGA1UEBhMCU0Ux
+FDASBgNVBAoTC0FkZFRydXN0IEFCMSYwJAYDVQQLEx1BZGRUcnVzdCBFeHRlcm5h
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+dDCCASIwDQYJKoZIhvcNAQEBBQADggEPADCCAQoCggEBALf3GjPm8gAELTngTlvt
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+IjAgBgNVBAMTGUFkZFRydXN0IEV4dGVybmFsIENBIFJvb3SCAQEwDQYJKoZIhvcN
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+YINRsPkyPef89iYTx4AWpb9a/IfPeHmJIZriTAcKhjW88t5RxNKWt9x+Tu5w/Rw5
+6wwCURQtjr0W4MHfRnXnJK3s9EK0hZNwEGe6nQY1ShjTK3rMUUKhemPR5ruhxSvC
+Nr4TDea9Y355e6cJDUCrat2PisP29owaQgVR1EX1n6diIWgVIEM8med8vSTYqZEX
+c4g/VhsxOBi0cQ+azcgOno4uG+GMmIPLHzHxREzGBHNJdmAPx/i9F4BrLunMTA5a
+mnkPIAou1Z5jJh5VkpTYghdae9C8x49OhgQ=
+-----END CERTIFICATE-----`