Upgrade miekg/pkcs11 from v1.0.3 to v1.1.1

[tstromberg]

Currently, the ThalesIgnite/crypto11 library does not build on OpenBSD:

$ go test .
# github.com/miekg/pkcs11
ld: error: unable to find library -ldl
cc: error: linker command failed with exit code 1 (use -v to see invocation)
FAIL	github.com/ThalesIgnite/crypto11 [build failed]
FAIL

This PR upgrades the miekg/pkcs11 component to a version that compiles cleanly on OpenBSD. Here are the functional PR's included in the miekg/pkcs11 upgrade from v1.0.3:

• p11: return predefined errors miekg/pkcs11#124
• Add support for exclusive sessions miekg/pkcs11#133
• Add p11.Module.Destroy() miekg/pkcs11#137
• -ldl not required on OpenBSD miekg/pkcs11#140
• [Issue #142] fix NewAttribute panic miekg/pkcs11#143
• Also allow CK_ constants miekg/pkcs11#150

For a more specific diff , see miekg/pkcs11@v1.0.3...v1.1.1