Tests: Teach RunCMake to tolerate 'Error kstat returned' lines in test output

When RunCMake tests run on Solaris, the output may contain unexpected
lines of the form "Error kstat returned...".  These lines are printed by
SystemInformationImplementation::RunProcess when called from
SystemInformationImplementation::ParseValueFromKStat (see issue #12066).
Until someone investigates why kstat returns values outside the range it
documents, simply remove such lines from the actual output before
matching it against the expected output.

Tests/RunCMake/RunCMake.cmake

@@ -83,7 +83,7 @@ function(run_cmake test)
   endif()
   foreach(o out err)
     string(REGEX REPLACE "\r\n" "\n" actual_std${o} "${actual_std${o}}")
-    string(REGEX REPLACE "(^|\n)((==[0-9]+==|BullseyeCoverage|[a-z]+\\([0-9]+\\) malloc:)[^\n]*\n)+" "\\1" actual_std${o} "${actual_std${o}}")
+    string(REGEX REPLACE "(^|\n)((==[0-9]+==|BullseyeCoverage|[a-z]+\\([0-9]+\\) malloc:|Error kstat returned)[^\n]*\n)+" "\\1" actual_std${o} "${actual_std${o}}")
     string(REGEX REPLACE "\n+$" "" actual_std${o} "${actual_std${o}}")
     set(expect_${o} "")
     if(DEFINED expect_std${o})