gn2bp: disable libunwind

libunwind should not be needed.

Test: none
Change-Id: I7ce419641bbf3c70297352e8dc855ae5dc14ab58
diff --git a/tools/gn2bp/gen_android_bp b/tools/gn2bp/gen_android_bp
index 5f3cf85..4103270 100755
--- a/tools/gn2bp/gen_android_bp
+++ b/tools/gn2bp/gen_android_bp
@@ -143,6 +143,8 @@
 # Android equivalents for third-party libraries that the upstream project
 # depends on.
 builtin_deps = {
+    '//buildtools/third_party/libunwind:libunwind':
+        lambda x: None, # disable libunwind
     '//net/tools/root_store_tool:root_store_tool':
         lambda x: None,
 }