Merge "Capture libeigen's header correctly"

		if strings.HasPrefix(dir, android.PathForOutput(ctx).String()) {

			continue

		}

		// libeigen wrongly exports the root directory "external/eigen". But only two

		// subdirectories "Eigen" and "unsupported" contain exported header files. Even worse

		// some of them have no extension. So we need special treatment for libeigen in order

		// to glob correctly.

		if dir == "external/eigen" {

			// Only these two directories contains exported headers.

			for _, subdir := range []string{"Eigen", "unsupported/Eigen"} {

				glob, err := ctx.GlobWithDeps("external/eigen/"+subdir+"/**/*", nil)

				if err != nil {

					ctx.ModuleErrorf("glob failed: %#v", err)

					return

				}

				for _, header := range glob {

					if strings.HasSuffix(header, "/") {

						continue

					}

					ext := filepath.Ext(header)

					if ext != "" && ext != ".h" {

						continue

					}

					ret = append(ret, android.PathForSource(ctx, header))

				}

			}

			continue

		}

		exts := headerExts

		// Glob all files under this special directory, because of C++ headers.

		if strings.HasPrefix(dir, "external/libcxx/include") {