Distclean normally fails to remove those files, so force it.

Index: elfutils-0.122/libasm/Makefile.am
===================================================================
--- elfutils-0.122.orig/libasm/Makefile.am	2006-07-20 13:07:48.000000000 +0200
+++ elfutils-0.122/libasm/Makefile.am	2006-07-20 13:08:02.000000000 +0200
@@ -100,4 +100,4 @@
 noinst_HEADERS = libasmP.h symbolhash.h
 EXTRA_DIST = libasm.map
 
-CLEANFILES = $(am_libasm_pic_a_OBJECTS) *.gcno *.gcda
+CLEANFILES = $(am_libasm_pic_a_OBJECTS) *.gcno *.gcda libasm.so.1
Index: elfutils-0.122/libdw/Makefile.am
===================================================================
--- elfutils-0.122.orig/libdw/Makefile.am	2006-07-20 13:07:48.000000000 +0200
+++ elfutils-0.122/libdw/Makefile.am	2006-07-20 13:08:02.000000000 +0200
@@ -129,4 +129,4 @@
 
 EXTRA_DIST = libdw.map
 
-CLEANFILES = $(am_libdw_pic_a_OBJECTS) *.gcno *.gcda
+CLEANFILES = $(am_libdw_pic_a_OBJECTS) *.gcno *.gcda libdw.so.1
Index: elfutils-0.122/libelf/Makefile.am
===================================================================
--- elfutils-0.122.orig/libelf/Makefile.am	2006-07-20 13:07:48.000000000 +0200
+++ elfutils-0.122/libelf/Makefile.am	2006-07-20 13:08:02.000000000 +0200
@@ -139,4 +139,4 @@
 		 version_xlate.h gnuhash_xlate.h dl-hash.h
 EXTRA_DIST = libelf.map
 
-CLEANFILES = $(am_libelf_pic_a_OBJECTS) *.gcno *.gcda
+CLEANFILES = $(am_libelf_pic_a_OBJECTS) *.gcno *.gcda libelf.so.1