elfutils: 0.166 -> 0.168

- Backport patches from debian to 0.168 and add US tags.

- Rebase 0001-build-Provide-alternatives-for-glibc-assumptions-hel.patch to support libc musl

(From OE-Core rev: 13e5819dc4ef44d99d0f22686365fd3c988d6bce)

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

meta/recipes-devtools/elfutils/elfutils-0.168/0001-fix-a-stack-usage-warning.patch

@@ -0,0 +1,28 @@
+[PATCH] fix a stack-usage warning
+
+Upstream-Status: Pending
+
+not use a variable to as a array size, otherwise the warning to error that
+stack usage might be unbounded [-Werror=stack-usage=] will happen
+
+Signed-off-by: Roy Li <rongqing.li@windriver.com>
+---
+ backends/ppc_initreg.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/backends/ppc_initreg.c b/backends/ppc_initreg.c
+index 64f5379..52dde3e 100644
+--- a/backends/ppc_initreg.c
++++ b/backends/ppc_initreg.c
+@@ -93,7 +93,7 @@ ppc_set_initial_registers_tid (pid_t tid __attribute__ ((unused)),
+ 	return false;
+     }
+   const size_t gprs = sizeof (user_regs.r.gpr) / sizeof (*user_regs.r.gpr);
+-  Dwarf_Word dwarf_regs[gprs];
++  Dwarf_Word dwarf_regs[sizeof (user_regs.r.gpr) / sizeof (*user_regs.r.gpr)];
+   for (unsigned gpr = 0; gpr < gprs; gpr++)
+     dwarf_regs[gpr] = user_regs.r.gpr[gpr];
+   if (! setfunc (0, gprs, dwarf_regs, arg))
+-- 
+1.9.1
+