sys-apps/watchdog: add two musl patches and bump eapi

Gentoo-Bug: https://bugs.gentoo.org/604260
(cherry picked from commit 02ab37b0d2b57a6c40e0b93978d37d8c4dc611bb)
Signed-off-by: Robin H. Johnson <robbat2@gentoo.org>
Fixes: https://github.com/gentoo/gentoo/pull/4423

sys-apps/watchdog/files/watchdog-5.15-musl-nfs.patch

@@ -0,0 +1,27 @@
+commit f52c40680f0aad44b9ae16648803453ec00cbb2c
+Author: Paul Crawford <psc@sat.dundee.ac.uk>
+Date:   Fri Dec 30 15:55:45 2016 +0000
+
+    Compile with musl when nfs is disabled
+    
+    musl does by default not ship with rpc headers. The watchdog should
+    not require rpc headers when nfs support is disabled.
+    
+    Patch by Felix Janda <fjanda@users.sf.net>
+
+diff --git a/include/sundries.h b/include/sundries.h
+index 4379982..98c489a 100644
+--- a/include/sundries.h
++++ b/include/sundries.h
+@@ -9,9 +9,11 @@
+ #include <signal.h>
+ #include <stdarg.h>
+ #include <stdlib.h>
++#if HAVE_NFS
+ #if !defined(bool_t) && !defined(__GLIBC__)
+ #include <rpc/types.h>
+ #endif
++#endif
+ 
+ extern int mount_mount_quiet;
+ extern int mount_verbose;

sys-apps/watchdog/files/watchdog-5.15-musl.patch

@@ -0,0 +1,23 @@
+commit c5cb4e1a0339844ae3f55ff1dc4a716c28012f05
+Author: Paul Crawford <psc@sat.dundee.ac.uk>
+Date:   Tue Jun 28 18:08:48 2016 +0100
+
+    Include linux/param.h for EXEC_PAGESIZE definition
+    
+    Musl does not include linux/param.h whereas glibc does, so it fails
+    to build on musl. Patch supplied by Khem Raj <raj.khem@gmail.com>
+
+diff --git a/src/watchdog.c b/src/watchdog.c
+index acf6450..486384a 100644
+--- a/src/watchdog.c
++++ b/src/watchdog.c
+@@ -26,6 +26,9 @@
+ #include <sys/param.h>		/* For EXEC_PAGESIZE */
+ #include <linux/oom.h>
+ #include <linux/watchdog.h>
++#ifdef __linux__
++#include <linux/param.h>
++#endif
+ #include <string.h>
+ 
+ #include <libgen.h>

sys-apps/watchdog/watchdog-5.15.ebuild

@@ -1,7 +1,7 @@
-# Copyright 1999-2016 Gentoo Foundation
+# Copyright 1999-2017 Gentoo Foundation
 # Distributed under the terms of the GNU General Public License v2
 
-EAPI=5
+EAPI=6
 
 inherit toolchain-funcs flag-o-matic systemd
 
@@ -17,6 +17,11 @@ IUSE="nfs"
 DEPEND="nfs? ( net-libs/libtirpc )"
 RDEPEND="${DEPEND}"
 
+PATCHES=(
+	"${FILESDIR}"/${P}-musl.patch
+	"${FILESDIR}"/${P}-musl-nfs.patch
+)
+
 src_configure() {
 	if use nfs ; then
 		tc-export PKG_CONFIG