Disable ABI dumps on Darwin.

I'm not sure why these targets are getting built as part of the sdk
build anyway, but we don't need them.

Test: treehugger
Bug: http://b/156513478
Bug: http://b/190394921
Change-Id: I1ea0e75f459ad7cad648f96b67a4f2424d36fda7
diff --git a/cc/ndk_abi.go b/cc/ndk_abi.go
index b9b57af..927fa2e 100644
--- a/cc/ndk_abi.go
+++ b/cc/ndk_abi.go
@@ -46,7 +46,7 @@
 
 		if m, ok := module.(*Module); ok {
 			if installer, ok := m.installer.(*stubDecorator); ok {
-				if canDumpAbi(m) {
+				if canDumpAbi() {
 					depPaths = append(depPaths, installer.abiDumpPath)
 				}
 			}