libhdhomerun: fix gcc-8.3.0 build

packages/multimedia/libhdhomerun/patches/libhdhomerun-pr19-fix-gcc-8.3.0-build.patch

@@ -0,0 +1,24 @@
+From a83ec0c045d3fadb78a879d0ac8ae999b89786df Mon Sep 17 00:00:00 2001
+From: fuzzard <bmurphy@bcmcs.net>
+Date: Sun, 24 Feb 2019 07:47:31 +1000
+Subject: [PATCH] alignas c++ fix
+
+alignas is a keyword in c++. Dont define.
+Change is in windows header already, and GCC 8.3.0 is erroring on this now.
+---
+ hdhomerun_os_posix.h | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/hdhomerun_os_posix.h b/hdhomerun_os_posix.h
+index baab8e5..d3dc5cb 100644
+--- a/hdhomerun_os_posix.h
++++ b/hdhomerun_os_posix.h
+@@ -53,7 +53,7 @@ typedef struct {
+ 
+ #define LIBHDHOMERUN_API
+ 
+-#if !defined(alignas)
++#if !defined(alignas) && !defined(__cplusplus)
+ #define alignas(n) __attribute__((aligned(n)))
+ #endif
+