notes-up: fix ftbfs vala 0.50

srcpkgs/notes-up/patches/vala-0.50.patch

@@ -0,0 +1,18 @@
+--- vapi/libmarkdown.vapi.orig	2020-11-21 13:32:35.540125253 +0700
++++ vapi/libmarkdown.vapi	2020-11-21 13:40:04.961780640 +0700
+@@ -41,7 +41,7 @@
+ 	public void initialize ();
+ 	public void with_html5_tags ();
+ 	public void shlib_destructor ();
+-	public char markdown_version[];
++	public string markdown_version;
+ 
+ 	[Compact]
+ 	[CCode (cname = "MMIOT", cprefix = "mkd_", free_function = "mkd_cleanup")]
+@@ -125,4 +125,4 @@
+ 		NOSTYLE,
+ 		EMBED
+ 	}
+-}
+\ No newline at end of file
++}