net/remmina: Fix build with -fno-common

Add a patch from upstream to fix the build of net/remmina with -fno-common,
which is the default with llvm 11.

MFH:		2020Q3 (implicit, -fno-common fixes, ok by joenum)

net/remmina/files/patch-27f84d1c.c

@@ -0,0 +1,23 @@
+diff --git a/src/remmina_stats.c b/src/remmina_stats.c
+index a6eb6f609ba7f0a5d444da2eb9f34684725625a5..3b7cbf0bf61964cc027c936b753bece49986c193 100644
+--- src/remmina_stats.c
++++ src/remmina_stats.c
+@@ -159,8 +159,6 @@
+ #endif
+ #include "remmina_stats.h"
+ 
+-struct utsname u;
+-
+ struct ProfilesData {
+ 	GHashTable *proto_count;
+ 	GHashTable *proto_date;
+@@ -864,9 +862,6 @@ JsonNode *remmina_stats_get_all()
+ 	json_builder_set_member_name(b, "REMMINAVERSION");
+ 	json_builder_add_value(b, n);
+ 
+-	if (uname(&u) == -1)
+-		g_print("uname:");
+-
+ 	n = remmina_stats_get_os_info();
+ 	json_builder_set_member_name(b, "SYSTEM");
+ 	json_builder_add_value(b, n);