lineage: Add techpack/audio to include path also

Change-Id: Ib5af4c77f3342c01325e32222401d7584bac337a
diff --git a/build/soong/Android.bp b/build/soong/Android.bp
index 2bb2836..382b68e 100644
--- a/build/soong/Android.bp
+++ b/build/soong/Android.bp
@@ -31,7 +31,7 @@
     cmd: "make $(KERNEL_MAKE_FLAGS) -C $(TARGET_KERNEL_SOURCE) O=$(genDir) ARCH=$(KERNEL_ARCH) $(KERNEL_CROSS_COMPILE) headers_install",
 
     // Directories that can be imported by a cc_* module generated_headers property
-    export_include_dirs: ["usr/include"],
+    export_include_dirs: ["usr/include", "usr/techpack/audio/include"],
 
     // Sources for dependency tracking
     dep_root: "$(TARGET_KERNEL_SOURCE)",