Change interface of ltelf_read_library

- base->bias, pass proc
diff --git a/sysdeps/linux-gnu/proc.c b/sysdeps/linux-gnu/proc.c
index 027af1c..596cea3 100644
--- a/sysdeps/linux-gnu/proc.c
+++ b/sysdeps/linux-gnu/proc.c
@@ -337,7 +337,7 @@
 			continue;
 		}
 
-		lib = ltelf_read_library(lib_name, rlm.l_addr);
+		lib = ltelf_read_library(proc, lib_name, rlm.l_addr);
 		if (lib == NULL) {
 			error(0, errno, "Couldn't load ELF object %s\n",
 			      lib_name);