audio-lnx: ANDROID_BUILD_TOP is deprecated.

ANDROID_BUILD_TOP variable is deprecated and thus all paths are
assumed to be relative to the top directory.

Change-Id: Ifc1bba67bf47092a37336581990d4bcce82a72f5

asoc/codecs/bolero/Kbuild

@@ -11,7 +11,7 @@ endif
 ifeq ($(KERNEL_BUILD), 1)
 	# These are configurable via Kconfig for kernel-based builds
 	# Need to explicitly configure for Android-based builds
-	AUDIO_BLD_DIR := $(ANDROID_BUILD_TOP)/kernel/msm-4.14
+	AUDIO_BLD_DIR := $(shell pwd)/kernel/msm-4.14
 	AUDIO_ROOT := $(AUDIO_BLD_DIR)/techpack/audio
 endif