log4cpp: fix musl compile

Include proper config.h (via log4cpp/Portability.hh) to fix the
evaluate of LOG4CPP_HAVE_STDINT_H in the file tests/Clock.hh

Fixes [1]:

  Clock.hh:17:13: error: 'int64_t' does not name a type
       typedef int64_t usec_t;

[1] http://autobuild.buildroot.net/results/186/1867632f30531da69f06b965bc833817400f618f

Signed-off-by: Peter Seiderer <ps.report@gmx.net>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/log4cpp/0001-Fix-musl-compile.patch

@@ -0,0 +1,34 @@
+From 17562259fb6684f351a70b98b4f3b438927ba1aa Mon Sep 17 00:00:00 2001
+From: Peter Seiderer <ps.report@gmx.net>
+Date: Mon, 11 Jul 2016 22:58:31 +0200
+Subject: [PATCH] Fix musl compile.
+
+Include proper config.h (via log4cpp/Portability.hh) to fix the
+evaluate of LOG4CPP_HAVE_STDINT_H in the file tests/Clock.hh
+
+Fixes:
+
+  Clock.hh:17:13: error: 'int64_t' does not name a type
+       typedef int64_t usec_t;
+
+Signed-off-by: Peter Seiderer <ps.report@gmx.net>
+---
+ log4cpp/tests/Clock.hh | 2 ++
+ 1 file changed, 2 insertions(+)
+
+diff --git a/log4cpp/tests/Clock.hh b/log4cpp/tests/Clock.hh
+index 4bf0ca4..45c6467 100644
+--- a/log4cpp/tests/Clock.hh
++++ b/log4cpp/tests/Clock.hh
+@@ -6,6 +6,8 @@
+ #ifndef __CLOCK_H
+ #define __CLOCK_H
+ 
++#include <log4cpp/Portability.hh>
++
+ #ifdef LOG4CPP_HAVE_STDINT_H
+ #include <stdint.h>
+ #endif // LOG4CPP_HAVE_STDINT_H
+-- 
+2.8.1
+