Prefix ENABLE_MEDIADRM_64 with TARGET_

This build-time flag should be prefixed.

Bug: 37039525
Test: Built OS
Change-Id: If6f6cd1ad2df5f000a4264cabeb7d9eb77e194ea
diff --git a/drm/1.0/default/Android.mk b/drm/1.0/default/Android.mk
index 7602399..4c05da8 100644
--- a/drm/1.0/default/Android.mk
+++ b/drm/1.0/default/Android.mk
@@ -41,8 +41,9 @@
 
 # TODO(b/18948909) Some legacy DRM plugins only support 32-bit. They need to be
 # migrated to 64-bit. Once all of a device's legacy DRM plugins support 64-bit,
-# that device can turn on ENABLE_MEDIADRM_64 to build this service as 64-bit.
-ifneq ($(ENABLE_MEDIADRM_64), true)
+# that device can turn on TARGET_ENABLE_MEDIADRM_64 to build this service as
+# 64-bit.
+ifneq ($(TARGET_ENABLE_MEDIADRM_64), true)
 LOCAL_32_BIT_ONLY := true
 endif
 
@@ -80,8 +81,9 @@
 
 # TODO: Some legacy DRM plugins only support 32-bit. They need to be migrated to
 # 64-bit. (b/18948909) Once all of a device's legacy DRM plugins support 64-bit,
-# that device can turn on ENABLE_MEDIADRM_64 to build this impl as 64-bit.
-ifneq ($(ENABLE_MEDIADRM_64), true)
+# that device can turn on TARGET_ENABLE_MEDIADRM_64 to build this impl as
+# 64-bit.
+ifneq ($(TARGET_ENABLE_MEDIADRM_64), true)
 LOCAL_32_BIT_ONLY := true
 endif