msm8226: Add system modules to BOOTCLASSPATH

Add qcmediaplayer and WfdCommon to build-time BOOTCLASSPATH
extension in order to generate odex for user variant builds.

Add oem-services modules to BOOTCLASSPATH to support proper
modem shutdown sequencing.

Change-Id: I7d46575414628a895f1be68589f549f9ecbeb01a
diff --git a/BoardConfig.mk b/BoardConfig.mk
index ec646e5..01e693d 100644
--- a/BoardConfig.mk
+++ b/BoardConfig.mk
@@ -80,3 +80,5 @@
 # Add QC Video Enhancements flag
 TARGET_ENABLE_QC_AV_ENHANCEMENTS := true
 TARGET_USE_QCOM_BIONIC_OPTIMIZATION := true
+
+TARGET_ADDITIONAL_BOOTCLASSPATH := qcmediaplayer:WfdCommon:oem-services