Provision libclang

PySide versions following 5.6 use a C++ parser based on Clang.
The Clang library (C-bindings), version 3.9 or higher is
required for building.

Change-Id: Ia7bcad46e3214d6d8b688354c9abdc83a513573c
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>

coin/provisioning/common/libclang.ps1

@@ -0,0 +1,32 @@
+param([Int32]$archVer=32)
+. "$PSScriptRoot\..\common\helpers.ps1"
+
+# PySide versions following 5.6 use a C++ parser based on Clang (http://clang.org/).
+# The Clang library (C-bindings), version 3.9 or higher is required for building.
+
+Get-Content "$PSScriptRoot\..\common\sw_versions.txt" | Foreach-Object {
+    $var = $_.Split('=')
+    New-Variable -Name $var[0] -Value $var[1]
+    $libclang_version = $libclang_version -replace '["."]'
+}
+
+if ( $archVer -eq 64 ) {
+    $sha1 = "dc42beb0efff130c4d7dfef3c97adf26f1ab04e0"
+    $url = "https://download.qt.io/development_releases/prebuilt/libclang/libclang-release_$libclang_version-windows-vs2015_64.7z"
+} else {
+    $sha1 = "64e826c00ae632fbb28655e6e1fa9194980e1205"
+    $url = "https://download.qt.io/development_releases/prebuilt/libclang/libclang-release_$libclang_version-windows-vs2015_32.7z"
+}
+
+$zip = "c:\users\qt\downloads\libclang.7z"
+$destination = "C:\Utils\libclang-" + $libclang_version
+
+Download $url $url $zip
+Verify-Checksum $zip $sha1
+
+C:\Utils\sevenzip\7z.exe x $zip -oC:\Utils\
+Rename-Item C:\Utils\libclang $destination
+
+[Environment]::SetEnvironmentVariable("LLVM_INSTALL_DIR", $destination, [EnvironmentVariableTarget]::Machine)
+del $zip
+echo "libClang = $libclang_version" >> ~/versions.txt