updated libdwarf version and dwarfdump build

var/spack/repos/builtin/packages/libdwarf/package.py

@@ -41,12 +41,10 @@ class Libdwarf(Package):
        MIPS/IRIX C compiler."""
 
     homepage = "http://www.prevanders.net/dwarf.html"
-    url      = "http://www.prevanders.net/libdwarf-20130729.tar.gz"
+    url      = "http://www.prevanders.net/libdwarf-20160507.tar.gz"
     list_url = homepage
 
-    version('20130729', '4cc5e48693f7b93b7aa0261e63c0e21d')
-    version('20130207', '64b42692e947d5180e162e46c689dfbf')
-    version('20130126', 'ded74a5e90edb5a12aac3c29d260c5db')
+    version('20160507', 'ae32d6f9ece5daf05e2d4b14822ea811')
 
     depends_on("libelf")
 
@@ -69,7 +67,7 @@ def install(self, spec, prefix):
             install('libdwarf.h',  prefix.include)
             install('dwarf.h',     prefix.include)
 
-        with working_dir('dwarfdump2'):
+        with working_dir('dwarfdump'):
             configure("--prefix=" + prefix)
 
             # This makefile has strings of copy commands that