Cherry-pick 1499ac3. rdar://115365275

    [iOS][GPUP] Allow required syscalls
    https://bugs.webkit.org/show_bug.cgi?id=261414
    rdar://115177854

    Reviewed by Chris Dumez.

    Allow required syscalls related to audio playback in the GPU process sandbox on iOS.

    * Source/WebKit/Resources/SandboxProfiles/ios/com.apple.WebKit.GPU.sb.in:

    Canonical link: https://commits.webkit.org/267871@main


(cherry picked from commit f60a938)

Canonical link: https://commits.webkit.org/267815.6@safari-7617.1.8-branch

Source/WebKit/Resources/SandboxProfiles/ios/com.apple.WebKit.GPU.sb.in

@@ -826,6 +826,8 @@
         SYS_kqueue_workloop_ctl
         SYS_lseek
         SYS_lstat64
+        SYS_mach_eventlink_signal_wait_until
+        SYS_mach_eventlink_wait_until
         SYS_madvise
         SYS_memorystatus_control
         SYS_mkdir