Split filepaths on ' ' in metadata generator

Test: go test

Change-Id: I5063c5a0b93501010b38aea91e8648cf5960ee6e
diff --git a/tools/metadata/generator.go b/tools/metadata/generator.go
index bb8293a..e970e17 100644
--- a/tools/metadata/generator.go
+++ b/tools/metadata/generator.go
@@ -153,7 +153,7 @@
 	}
 
 	inputFileData := strings.TrimRight(readFileToString(*inputFile), "\n")
-	filePaths := strings.Split(inputFileData, "\n")
+	filePaths := strings.Split(inputFileData, " ")
 	if len(filePaths) == 1 && filePaths[0] == "" {
 		writeNewlineToOutputFile(*outputFile)
 		return