Disable abi diffs for sanitized variants of modules.

asan variants can sometimes have extra exported symbols (this is a vndk
extension violation). Since asan variants are only used for testing,
don't do abi diffs for them.

Bug: 66301104

Test: Without the change, libc++.so.lsdump exists for the asan variant;
      with the change, it does not.

Test: make -j64.

Change-Id: I61a4c7a3e9aa0028a54ad0ca8715e8c77aebad94

cc/cc.go

@@ -530,7 +530,12 @@ func (ctx *moduleContextImpl) isVndkExt() bool {
 
 // Create source abi dumps if the module belongs to the list of VndkLibraries.
 func (ctx *moduleContextImpl) createVndkSourceAbiDump() bool {
-	return ctx.ctx.Device() && ((ctx.useVndk() && ctx.isVndk()) || inList(ctx.baseModuleName(), llndkLibraries))
+	isUnsanitizedVariant := true
+	sanitize := ctx.mod.sanitize
+	if sanitize != nil {
+		isUnsanitizedVariant = sanitize.isUnsanitizedVariant()
+	}
+	return isUnsanitizedVariant && ctx.ctx.Device() && ((ctx.useVndk() && ctx.isVndk()) || inList(ctx.baseModuleName(), llndkLibraries))
 }
 
 func (ctx *moduleContextImpl) selectedStl() string {