selinux: whitelist gpu ioctl command for Adreno dEQP

avc: denied { ioctl } for path="/dev/kgsl-3d0" dev="tmpfs" ino=9277
ioctlcmd=937 scontext=u:r:platform_app:s0:c512,c768
tcontext=u:object_r:gpu_device:s0 tclass=chr_file

Change-Id: I9ca574063b40e87c76478208052640bc793c506f
Bug: 27883312
diff --git a/sepolicy/ioctl_macros b/sepolicy/ioctl_macros
index af8e65e..44de156 100644
--- a/sepolicy/ioctl_macros
+++ b/sepolicy/ioctl_macros
@@ -11,6 +11,7 @@
 # 0xc01c0934
 # 0xc0080935
 # 0xc0280936
+# 0x00000937
 # 0xc02c093d
 define(`gpu_unused_ioctls', `{
 IOCTL_KGSL_DEVICE_WAITTIMESTAMP
@@ -51,5 +52,6 @@
 IOCTL_KGSL_GPUMEM_ALLOC_ID
 IOCTL_KGSL_GPUMEM_FREE_ID
 IOCTL_KGSL_GPUMEM_GET_INFO
+IOCTL_KGSL_GPUMEM_SYNC_CACHE
 IOCTL_KGSL_SUBMIT_COMMANDS
 }')