allow setting opengles property

Addresses:
avc:  denied  { set } for property=ro.opengles.version
scontext=u:r:qemu_props:s0 tcontext=u:object_r:opengles_prop:s0
tclass=property_service

Test: build
Change-Id: Ia7445344726b941ad153a126dfe66df4bc8536ab
diff --git a/target/board/generic/sepolicy/qemu_props.te b/target/board/generic/sepolicy/qemu_props.te
index 0f5ec8c..33055c8 100644
--- a/target/board/generic/sepolicy/qemu_props.te
+++ b/target/board/generic/sepolicy/qemu_props.te
@@ -4,6 +4,7 @@
 
 init_daemon_domain(qemu_props)
 
+set_prop(qemu_props, opengles_prop)
 set_prop(qemu_props, qemu_prop)
 set_prop(qemu_props, dalvik_prop)
 set_prop(qemu_props, qemu_cmdline)