Return early after NDK->non-NDK library link error

Otherwise the code after this assumes that the "to" library is an NDK
library and panics when it isn't.

Bug: 124019854
Test: trigger error, no longer see panic
Change-Id: I88d10e8d882285e24b4f42d0cf85c2d658348617

cc/cc.go

@@ -1378,6 +1378,7 @@ func checkLinkType(ctx android.ModuleContext, from *Module, to *Module, tag depe
 		// NDK code linking to platform code is never okay.
 		ctx.ModuleErrorf("depends on non-NDK-built library %q",
 			ctx.OtherModuleName(to))
+		return
 	}
 
 	// At this point we know we have two NDK libraries, but we need to