Fuzzing: Discard logging output from QSslCertificate

It's pointless in a fuzzer and slows down execution.

Change-Id: I0d36ed8814cf8fb332c196ea7e24eae8ee4d3c6e
Reviewed-by: Albert Astals Cid <albert.astals.cid@kdab.com>

tests/libfuzzer/network/ssl/qsslcertificate/qsslcertificate/pem/main.cpp

@@ -29,6 +29,10 @@
 #include <QSslCertificate>
 
 extern "C" int LLVMFuzzerTestOneInput(const char *Data, size_t Size) {
+    // to reduce noise and increase speed
+    static char quiet[] = "QT_LOGGING_RULES=qt.network.ssl=false";
+    static int pe = putenv(quiet);
+    Q_UNUSED(pe);
     QSslCertificate ssl(QByteArray::fromRawData(Data, Size), QSsl::Pem);
     return 0;
 }