Expose more useful functions that can be used by dumpstate_board().

BUG: 28640932
Fixes: 28867848
Change-Id: I38123e5b348f4560212559176eb60dbad4f22364
diff --git a/cmds/dumpstate/dumpstate.cpp b/cmds/dumpstate/dumpstate.cpp
index 1add346..6a66abd 100644
--- a/cmds/dumpstate/dumpstate.cpp
+++ b/cmds/dumpstate/dumpstate.cpp
@@ -97,7 +97,7 @@
 // TODO: change to "v1" before final N build
 static std::string VERSION_DEFAULT = "v1-dev4";
 
-static bool is_user_build() {
+bool is_user_build() {
     return 0 == strncmp(build_type, "user", PROPERTY_VALUE_MAX - 1);
 }
 
@@ -586,7 +586,6 @@
     return add_zip_entry_from_fd(ZIP_ROOT_DIR + path, fd) ? 0 : 1;
 }
 
-/* adds all files from a directory to the zipped bugreport file */
 void add_dir(const char *dir, bool recursive) {
     if (!zip_writer) {
         MYLOGD("Not adding dir %s because zip_writer is not set\n", dir);