lmms: create recipe.

I used this version rather than the current v1.1, because this git
snapshot has my upstreamed patches for Haiku in it.

media-sound/lmms/patches/lmms-1.2.0.patch

@@ -0,0 +1,25 @@
+From 818d2a84a9ec2d73a082585578b8b46ad4d1dd47 Mon Sep 17 00:00:00 2001
+From: Augustin Cavalier <waddlesplash@gmail.com>
+Date: Mon, 16 Mar 2015 17:50:12 -0400
+Subject: [PATCH] Allow running as root on Haiku.
+
+---
+ src/core/main.cpp | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/src/core/main.cpp b/src/core/main.cpp
+index 5313811..73c031b 100644
+--- a/src/core/main.cpp
++++ b/src/core/main.cpp
+@@ -142,7 +142,7 @@ int main( int argc, char * * argv )
+ 		}
+ 	}
+ 
+-#ifndef LMMS_BUILD_WIN32
++#if !defined(LMMS_BUILD_WIN32) && !defined(__HAIKU__)
+ 	if ( ( getuid() == 0 || geteuid() == 0 ) && !allow_root )
+ 	{
+ 		printf("LMMS cannot be run as root.\nUse \"--allowroot\" to override.\n\n");
+-- 
+2.2.2
+