elfutils: 0.170 -> 0.172

- Update debian 0.170 patches and rebase them for 0.172;

- Drop 0001-Use-fallthrough-attribute.patch which was
  accepted by upstream;

- Drop 0001-Ensure-that-packed-structs-follow-the-gcc-memory-lay.patch
  which was backported from upstream;

(From OE-Core rev: dbbe9c1d1f822cf13a4c16b79bccf6bf5c4b91e4)

Signed-off-by: Hongxu Jia <hongxu.jia@windriver.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-devtools/elfutils/files/0003-fixheadercheck.patch

@@ -1,4 +1,4 @@
-From 565d5935abf5b58773f9c8385c00189221980d98 Mon Sep 17 00:00:00 2001
+From 04fb3f65ec186df5231dd0c21780a55dcc03c868 Mon Sep 17 00:00:00 2001
 From: Hongxu Jia <hongxu.jia@windriver.com>
 Date: Tue, 15 Aug 2017 17:17:20 +0800
 Subject: [PATCH 3/7] fixheadercheck
@@ -21,7 +21,7 @@ Signed-off-by: Hongxu Jia <hongxu.jia@windriver.com>
  1 file changed, 2 insertions(+), 2 deletions(-)
 
 diff --git a/libelf/elf32_updatenull.c b/libelf/elf32_updatenull.c
-index d83c0b3..a51bf70 100644
+index 3e9ef61..5351518 100644
 --- a/libelf/elf32_updatenull.c
 +++ b/libelf/elf32_updatenull.c
 @@ -339,8 +339,8 @@ __elfw2(LIBELFBITS,updatenull_wrlock) (Elf *elf, int *change_bop, size_t shnum)
@@ -36,5 +36,5 @@ index d83c0b3..a51bf70 100644
  		      __libelf_seterrno (ELF_E_INVALID_ALIGN);
  		      return -1;
 -- 
-1.8.3.1
+2.7.4