Allow access to power log service in internal builds

https://bugs.webkit.org/show_bug.cgi?id=241688
<rdar://82442196>

Reviewed by Geoffrey Garen.

Allow access to power log service in the GPU process in internal builds.

* Source/WebKit/GPUProcess/mac/com.apple.WebKit.GPUProcess.sb.in:

Canonical link: https://commits.webkit.org/251710@main
git-svn-id: https://svn.webkit.org/repository/webkit/trunk@295705 268f45cc-cd09-0410-ab3c-d52691b4dbfc

Source/WebKit/GPUProcess/mac/com.apple.WebKit.GPUProcess.sb.in

@@ -661,6 +661,10 @@
         (extension "com.apple.webkit.extension.mach")
         (global-name "com.apple.powerlog.plxpclogger.xpc")))
 
+(with-filter (system-attribute apple-internal)
+    (allow mach-lookup
+        (global-name "com.apple.powerlog.plxpclogger.xpc")))
+
 (with-filter (uid 0)
     (allow mach-lookup
         (global-name "com.apple.system.logger")))