QT 5.9.3 does not link against libnss3.so in CentOS 7

In CentOS 7 when I use the released QT 5.9.2 to build an application that uses QWebEngineView I am able to connect to pages using HTTPS without issue.  When I run the same application using the released QT 5.9.3 I get these error messages:

[11863:11873:1213/090956.282474:ERROR:cert_verify_proc_openssl.cc(212)] X509 Verification error unable to get local issuer certificate : 20 : 1 : 4

These symptoms have only been observed in CentOS 7 and were not reproduced in Ubuntu 14 or in Windows.

I think this is because NSS is not being linked in QT 5.9.3 when it is for QT 5.9.2.

When I checked what libQt5WebEngine.so.5 is linked against I see this for QT 5.9.2:

# ldd /opt/Qt/5.9.2/gcc_64/./qml/QtWebEngine/../../lib/libQt5WebEngine.so.5 | grep nss
{{ libnss3.so => /lib64/libnss3.so (0x00007fae78924000)}}
{{ libnssutil3.so => /lib64/libnssutil3.so (0x00007fae786f6000)}}

but for QT 5.9.3, I get no results.