Don't run 'make releasecheck'. Cannot succeed with installed libpcap

Missing commit:
"pcap: make the seconds and microseconds/nanoseconds fields unsigned."

.cirrus.yml

@@ -54,7 +54,7 @@ linux_task:
     - git -C .. clone --depth ${CIRRUS_CLONE_DEPTH} --branch=master --quiet ${LIBPCAP_GIT}
     - ./autogen.sh
     - ./configure --quiet # build the Makefile
-    - make releasecheck
+    #- make releasecheck
     - make whitespacecheck
     - make shellcheck
     - ./build_matrix.sh