Skip some tests known to fail, and declare package conflict

The test fail is a known issues that got removed when syncing with Fedora.
The conflict is due to a move of licence files from doc to core package.

Related: rhbz#1957948

cmake.spec

@@ -65,7 +65,7 @@
 %{?rcsuf:%global versuf -%{rcsuf}}
 
 # For handling bump release by rpmdev-bumpspec and mass rebuild
-%global baserelease 2
+%global baserelease 3
 
 # Uncomment if building for EPEL
 #global name_suffix %%{major_version}
@@ -196,6 +196,9 @@ Requires:       %{name}-filesystem%{?_isa} = %{version}-%{release}
 # Explicitly require make.  (rhbz#1862014)
 Requires:       make
 
+# When license files moved from the doc package to main package.
+Conflicts:      %{name}-doc <= 3.18.2
+
 # Provide the major version name
 Provides: %{orig_name}%{major_version} = %{version}-%{release}
 
@@ -443,6 +446,13 @@ NO_TEST="CTestTestUpload|CPackComponentsForAll-RPM-IgnoreGroup|CPack_RPM.DEBUGIN
 %ifarch s390x
 NO_TEST="$NO_TEST|kwsys.testProcess-4|kwsys.testProcess-5"
 %endif
+
+# RunCMake.PrecompileHeaders test uses precompiled file presumably compiled with different compiler
+# that one of RHEL8 (GCC-8.3.1). See https://bugzilla.redhat.com/show_bug.cgi?id=1721553#c4
+%if 0%{?rhel} && 0%{?rhel} > 7
+NO_TEST="$NO_TEST|RunCMake.PrecompileHeaders"
+%endif
+
 # curl test may fail during bootstrap
 %if %{with bootstrap}
 NO_TEST="$NO_TEST|curl"
@@ -519,6 +529,9 @@ popd
 
 
 %changelog
+* Thu Jun 17 2021 sguelton@redhat.com - 3.20.2-3
+- Fix rhbz#1964392 and rhbz#1964407
+
 * Tue Jun 22 2021 Mohan Boddu <mboddu@redhat.com> - 3.20.2-2
 - Rebuilt for RHEL 9 BETA for openssl 3.0
   Related: rhbz#1971065