crypto/tls: timeouts in test broke arm5 builder

[bradfitz]

The arm5 builder is really slow.

These new test timeouts were too much:
https://go-review.googlesource.com/c/go/+/144116

Breakage:
https://build.golang.org/log/1d714db6c446f94662c31179523d92f0de2f3665

ok  	crypto/subtle	0.062s
--- FAIL: TestClientAuth (1.52s)
    handshake_server_test.go:626: TLSv12-ClientAuthRequestedAndECDSAGiven #4: read tcp 127.0.0.1:57366->127.0.0.1:39527: i/o timeout
        Read 0, wanted 144, got , wanted 14030300010116030300400000000000000000000000000000000013c4d23fb084083274decce097908ac6cc9487ac4865f72004184268468ec019b69d2a84588520b3ed7594714e5b0ade170303004000000000000000000000000000000000c26ec5134d35abb1dee21ba66f0e4064cc67bf0db1e4fe48c401356a9450177ab36bf66b2a24c9b97bb0420e714dc2da
--- FAIL: TestHandshakeClientECDHEECDSAChaCha20 (1.00s)
    handshake_client_test.go:395: TLSv12-ECDHE-ECDSA-CHACHA20-POLY1305 #2: read tcp 127.0.0.1:39527->127.0.0.1:57432: i/o timeout
--- FAIL: TestHandshakeClientCertRSA (1.22s)
    handshake_client_test.go:395: TLSv10-ClientCert-RSA-ECDSA #2: read tcp 127.0.0.1:39527->127.0.0.1:57436: i/o timeout
--- FAIL: TestHandshakeClientECDHEECDSAAESGCM (1.06s)
    handshake_client_test.go:395: TLSv12-ECDHE-ECDSA-AES-GCM #2: read tcp 127.0.0.1:39527->127.0.0.1:57448: i/o timeout
--- FAIL: TestHandshakeClientECDHEECDSAAES128CBCSHA256 (1.05s)
    handshake_client_test.go:395: TLSv12-ECDHE-ECDSA-AES128-SHA256 #2: read tcp 127.0.0.1:39527->127.0.0.1:57450: i/o timeout
--- FAIL: TestHandshakeClientCertECDSA (3.10s)
    handshake_client_test.go:395: TLSv10-ClientCert-ECDSA-ECDSA #2: read tcp 127.0.0.1:39527->127.0.0.1:57454: i/o timeout
--- FAIL: TestHandshakeClientAES256GCMSHA384 (1.02s)
    handshake_client_test.go:395: TLSv12-ECDHE-ECDSA-AES256-GCM-SHA384 #2: read tcp 127.0.0.1:39527->127.0.0.1:57464: i/o timeout
--- FAIL: TestHandshakeClientECDHEECDSAAES (1.02s)
    handshake_client_test.go:395: TLSv10-ECDHE-ECDSA-AES #2: read tcp 127.0.0.1:39527->127.0.0.1:57474: i/o timeout
FAIL
FAIL	crypto/tls	24.738s

[bradfitz]

Also broke mips, which is also slow:
https://build.golang.org/log/1d714db6c446f94662c31179523d92f0de2f3665

[FiloSottile]

Wow, that's slower than I thought computers could go. I'll bump it to a minute, less useful but still better than a test timeout.

[gopherbot]

Change https://golang.org/cl/145037 mentions this issue: crypto/tls: bump test timeouts from 1s to 1m for slow builders