openssh: add patch to skip -fzero-call-used-regs check for mips64el

- This check somehow succeeded during configure checks, but it later
  failed during build.
- Might be a GCC oversight.

app-network/openssh/autobuild/patches/0001-configure.ac-fix-fzero-call-used-regs-used-for-mips6.patch

@@ -0,0 +1,37 @@
+From bee2a942be50c7a879e74a1c0a76c927cae9048f Mon Sep 17 00:00:00 2001
+From: Cyan <[email protected]>
+Date: Fri, 22 Dec 2023 21:17:03 +0800
+Subject: [PATCH] configure.ac: fix -fzero-call-used-regs=used for mips64
+ targets
+
+- This check somehow succeeded during configure check, but failed during
+  build.
+---
+ configure.ac | 11 ++++++++++-
+ 1 file changed, 10 insertions(+), 1 deletion(-)
+
+diff --git a/configure.ac b/configure.ac
+index 379cd74..e36cc60 100644
+--- a/configure.ac
++++ b/configure.ac
+@@ -236,7 +236,16 @@ if test "$GCC" = "yes" || test "$GCC" = "egcs"; then
+ 	case "$CLANG_VER" in
+ 	apple-15*) OSSH_CHECK_CFLAG_LINK([-fzero-call-used-regs=used]) ;;
+ 	17*)	;;
+-	*)	OSSH_CHECK_CFLAG_LINK([-fzero-call-used-regs=used]) ;;
++	*)
++		case "$host" in
++			# FIXME possible GCC oversight - 
++			# sorry, unimplemented: argument ‘used’ is not supported for ‘-fzero-call-used-regs’ on this target
++			# This check passed during configure, but failed later during build.
++			# It should fail during this check.
++			mips64el*) 	;;
++			*)		OSSH_CHECK_CFLAG_LINK([-fzero-call-used-regs=used]) ;;
++		esac
++		;;
+ 	esac
+ 	OSSH_CHECK_CFLAG_COMPILE([-ftrivial-auto-var-init=zero])
+     fi
+-- 
+2.39.1
+