Add tests for (named) bitstring to suite_asn1write
diff --git a/tests/data_files/server1.key_usage.crt b/tests/data_files/server1.key_usage.crt
index 8f4e59f..303a222 100644
--- a/tests/data_files/server1.key_usage.crt
+++ b/tests/data_files/server1.key_usage.crt
@@ -10,11 +10,11 @@
lZvc/kFeF6babFtpzAK6FCwWJJxK3M3Q91Jnc/EtoCP9fvQxyi1wyokLBNsupk9w
bp7OvViJ4lNZnm5akmXiiD8MlBmj3eXonZUT7Snbq3AS3FrKaxerUoJUsQIDAQAB
o10wWzAJBgNVHRMEAjAAMB0GA1UdDgQWBBQfdNY/KcF0dEU7BRIsPai9Q1kCpjAf
-BgNVHSMEGDAWgBS0WuSls97SUva51aaVD+s+vMf9/zAOBgNVHQ8BAf8EBAMCAeAw
-DQYJKoZIhvcNAQEFBQADggEBABKC/1x0m57EY4H412ue3ghCWgg07VcRKamnUSTs
-tnqI5T0mSvuPrxhINdQB6360ibctBkXP3S9rxGHiUdeK/JqxYs2YamCs50TSWpon
-p4Hzcmjsw1YgXsQ6pmYwkzU03zqs361gt7JSOzL2dN0IjwIy47qfLQb/AXhX2Ims
-7gBuqVpYqJuSHR0qsN/c6WgIE3IrbK1MB6CJTkxBfcSc5E4oUIBHmww+RSVLOczM
-nGk3U13dmfG0ndhMtrMyyxBZZSUwoZLjRZ6J5mHSv+k8oo1PYQeiivNEP53mgVaY
-ha0gLUIk6zNBRpY1uUmxQ+RQSMIyYPBb1RedHn2s8El2mlo=
+BgNVHSMEGDAWgBS0WuSls97SUva51aaVD+s+vMf9/zAOBgNVHQ8BAf8EBAMCBeAw
+DQYJKoZIhvcNAQEFBQADggEBAFqG4NbAqtsec3lFOiUDKQiGmMCO4Yq3NHhnRWkD
+e9r9jWo+gfLgfUJKe02a76ciE5forJRFxG4+pa3Lo38WsF5/2YRz3IfQLOjcK6c6
+DdHrTEsPXgdqhVYJZgZbCeD5Yu5YBXlegGOrlXB9+71BKX0H+AkrR2oXsdg/31Kn
+R17yP84tLucQpLdh079ecE8QTZ/21n0VTag6fQFHMeMY35MWkT4K6eRrz/Dta2tm
+keHSq/coKsmm0poYPzoMPcbh/D+kSa05Ut03NL2Y+2Q9uTjv5/K/zOgGef/mJbV2
+QxB+1as+WLTtpwc20IqAz3PVBoxbRyN2Z6vjiqqAzGlfB4M=
-----END CERTIFICATE-----