libnfc: Fix build with musl

Signed-off-by: Khem Raj <raj.khem@gmail.com>

meta-oe/recipes-core/libnfc/libnfc/0001-usbbus-Include-stdint.h-for-uintX_t.patch

@@ -0,0 +1,24 @@
+From cb2a3991545ba9e885704226ed3e831bd5e4cb27 Mon Sep 17 00:00:00 2001
+From: Khem Raj <raj.khem@gmail.com>
+Date: Mon, 20 May 2019 22:10:05 -0700
+Subject: [PATCH] usbbus: Include stdint.h for uintX_t
+
+stdint.h is needed for uintX_t typedefs which are
+used to replace u_intX_t in libusb API headers in the cmake files
+
+Upstream-Status: Submitted [https://github.com/nfc-tools/libnfc/pull/544]
+Signed-off-by: Khem Raj <raj.khem@gmail.com>
+---
+ libnfc/buses/usbbus.h | 2 ++
+ 1 file changed, 2 insertions(+)
+
+--- a/libnfc/buses/usbbus.h
++++ b/libnfc/buses/usbbus.h
+@@ -35,6 +35,7 @@
+ 
+ #ifndef _WIN32
+ // Under POSIX system, we use libusb (>= 0.1.12)
++#include <stdint.h>
+ #include <usb.h>
+ #define USB_TIMEDOUT ETIMEDOUT
+ #define _usb_strerror( X ) strerror(-X)

meta-oe/recipes-core/libnfc/libnfc_git.bb

@@ -9,6 +9,9 @@ inherit autotools pkgconfig
 
 S = "${WORKDIR}/git"
 SRCREV = "c42e2502d4627d3ea62f83c32677b100bb3cebdc"
-SRC_URI = "git://github.com/nfc-tools/libnfc.git"
+SRC_URI = "git://github.com/nfc-tools/libnfc.git \
+           file://0001-usbbus-Include-stdint.h-for-uintX_t.patch \
+          "
 
+CFLAGS_append_libc-musl = " -D_GNU_SOURCE"
 DEPENDS = "libusb"