sys-auth/pam_u2f: backport a patch to fix a build failure

There is a missing limits.h include but there are no new releases that
includes the fix. Backport it.

Closes: https://bugs.gentoo.org/751742
Package-Manager: Portage-3.0.13, Repoman-3.0.2
Signed-off-by: Göktürk Yüksek <gokturk@gentoo.org>

sys-auth/pam_u2f/files/pam_u2f-1.1.0-include-limits_h.patch

@@ -0,0 +1,41 @@
+From d46b5ed35017b089c30dd21305ac2147fcfc24f0 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?=C4=90o=C3=A0n=20Tr=E1=BA=A7n=20C=C3=B4ng=20Danh?=
+ <congdanhqx@gmail.com>
+Date: Fri, 16 Oct 2020 06:49:08 +0700
+Subject: [PATCH] b64,util: always include limits.h
+
+UCHAR_MAX and INT_MAX are defined within limits.h
+
+Current codebase failed to be built in Linux with musl libc due to
+missing this inclusion.
+
+Fix it.
+---
+ b64.c  | 1 +
+ util.c | 1 +
+ 2 files changed, 2 insertions(+)
+
+diff --git a/b64.c b/b64.c
+index 0649c1e..7788089 100644
+--- a/b64.c
++++ b/b64.c
+@@ -4,6 +4,7 @@
+ 
+ #include <openssl/bio.h>
+ #include <openssl/evp.h>
++#include <limits.h>
+ #include <stdint.h>
+ #include <string.h>
+ 
+diff --git a/util.c b/util.c
+index fdae095..3ea1bd2 100644
+--- a/util.c
++++ b/util.c
+@@ -9,6 +9,7 @@
+ #include <openssl/ec.h>
+ #include <openssl/obj_mac.h>
+ 
++#include <limits.h>
+ #include <stdlib.h>
+ #include <fcntl.h>
+ #include <sys/stat.h>

sys-auth/pam_u2f/pam_u2f-1.1.0.ebuild

@@ -1,4 +1,4 @@
-# Copyright 1999-2020 Gentoo Authors
+# Copyright 1999-2021 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
 EAPI=7
@@ -22,7 +22,10 @@ DEPEND="
 RDEPEND="${DEPEND}"
 BDEPEND="virtual/pkgconfig"
 
-PATCHES=( "${FILESDIR}/${PN}-1.0.2-fix-Makefile.patch" )
+PATCHES=(
+	"${FILESDIR}/${PN}-1.0.2-fix-Makefile.patch"
+	"${FILESDIR}/${PN}-1.1.0-include-limits_h.patch"
+)
 
 src_prepare() {
 	default