Clang: Fix providing clang directory with intrinsics for *.qbs

This was forgotten in e488f10c.

Change-Id: I2fec272c9f1e44b3a691b782dcf6bee2a1768371
Reviewed-by: Christian Kandeler <christian.kandeler@theqtcompany.com>
Reviewed-by: Eike Ziller <eike.ziller@theqtcompany.com>

src/plugins/clangcodemodel/clangcodemodel.qbs

@@ -53,7 +53,7 @@ QtcPlugin {
     property string llvmIncludeDir: QtcProcessOutputReader.readOutput(llvmConfig, ["--includedir"])
     property string llvmLibDir: QtcProcessOutputReader.readOutput(llvmConfig, ["--libdir"])
     property string llvmVersion: QtcProcessOutputReader.readOutput(llvmConfig, ["--version"])
-        .replace(/(\d+\.\d+).*/, "$1")
+        .replace(/(\d+\.\d+\.\d+).*/, "$1")
 
     cpp.includePaths: base.concat(llvmIncludeDir)
     cpp.libraryPaths: base.concat(llvmLibDir)