audio: fixes for dual mic capture

Added path definition for dual mic capture with fluence for
voice recognition.
This allows to use the dual mic path without fluence for voice recognition
when front and back mic are selected for carture.

Also added missing clean step in commit 7dacf650 for dual mic support.

Change-Id: Ief84252fcee9bd1e2b7dab0d9051c18377bec9cf
diff --git a/CleanSpec.mk b/CleanSpec.mk
index 4c61611..4760fe2 100644
--- a/CleanSpec.mk
+++ b/CleanSpec.mk
@@ -111,3 +111,4 @@
                               $(PRODUCT_OUT)/symbols/system/bin/alsaucm_test \
                               $(PRODUCT_OUT)/symbols/system/bin/aplay \
                               $(PRODUCT_OUT)/symbols/system/bin/arec)
+$(call add-clean-step, rm -f $(OUT_DIR)/target/product/mako/system/build.prop)
\ No newline at end of file
diff --git a/mixer_paths.xml b/mixer_paths.xml
index 0b9d58d..382b953 100644
--- a/mixer_paths.xml
+++ b/mixer_paths.xml
@@ -450,4 +450,12 @@
         <path name="dmic-broadside" />
     </path>
 
+    <path name="voice-rec-dmic-ef-fluence">
+        <path name="dmic-endfire" />
+    </path>
+
+    <path name="voice-rec-dmic-bs-fluence">
+        <path name="dmic-broadside" />
+    </path>
+
 </mixer>