Add an optional root prefix to Linux dumpers

src/client/linux/minidump_writer/linux_core_dumper.cc

Index: src/client/linux/minidump_writer/linux_core_dumper.cc
diff --git a/src/client/linux/minidump_writer/linux_core_dumper.cc b/src/client/linux/minidump_writer/linux_core_dumper.cc
index d732824593bf59bc510cc6e9e0804d0cc32d39c2..622f05069432e6919ec93a2b2a8232102ed76e24 100644
--- a/src/client/linux/minidump_writer/linux_core_dumper.cc
+++ b/src/client/linux/minidump_writer/linux_core_dumper.cc
@@ -49,8 +49,9 @@ namespace google_breakpad {
 
 LinuxCoreDumper::LinuxCoreDumper(pid_t pid,
                                  const char* core_path,
-                                 const char* procfs_path)
-    : LinuxDumper(pid),
+                                 const char* procfs_path,
+                                 const char* root_prefix)
+    : LinuxDumper(pid, root_prefix),
       core_path_(core_path),
       procfs_path_(procfs_path),
       thread_infos_(&allocator_, 8) {