Pass compiler.runtime setting to conan

When MSVC is not autodected, necessary setting compiler.runtime has
undefined value, breaking installation of packages. This setting is not
supported by MinGW, so it should be optional.

Task-number: QTQAINFRA-998
Change-Id: Ia1a09eee14275314c160c7c45cd6ab276367dcdb
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>

coin/provisioning/common/conan.ps1

@@ -15,9 +15,14 @@ function Run-Conan-Install
         [string]$BuildinfoDir,
         [string]$Arch,
         [string]$Compiler,
-        [string]$CompilerVersion
+        [string]$CompilerVersion,
+        [string]$CompilerRuntime
     )
 
+    if ($CompilerRuntime) {
+        $runtimeArg = "-s compiler.runtime=$($CompilerRuntime)"
+    }
+
     Get-ChildItem -Path "$ConanfilesDir\*.txt" |
     ForEach-Object {
         $outpwd = "C:\Utils\conanbuildinfos\$($BuildinfoDir)\$($_.BaseName)"
@@ -27,7 +32,7 @@ function Run-Conan-Install
             -WorkingDirectory $outpwd `
             -ArgumentList "install -i -f $($_.FullName)", `
                 '-s', ('compiler="' + $Compiler + '"'), `
-                "-s os=Windows -s arch=$($Arch) -s compiler.version=$($CompilerVersion)" `
-            -NoNewWindow -Wait
+                "-s os=Windows -s arch=$($Arch) -s compiler.version=$($CompilerVersion) $($runtimeArg)" `
+            -NoNewWindow -Wait -Verbose
     }
 }