Stop installing an empty headers directory.

A fix has been submitted to https://github.com/FreeRDP/Remmina/pull/428.

While a proper decision is not made there, just patch the code to stop
calling INSTALL(DIRECTORY ...) with a path that does not exist. Until CMake
3.1.0, this would end up creating an empty directory (hence the @dir entry
in the plist). The behavior has changed in 3.1.0, and we were getting build
errors because we were referring to a directory that did not exist in the
plist.

net/remmina/Makefile

@@ -3,7 +3,7 @@
 
 PORTNAME=	remmina
 PORTVERSION=	1.0.0
-PORTREVISION=	3
+PORTREVISION=	4
 CATEGORIES=	net gnome
 
 MAINTAINER=	fluffy@FreeBSD.org

net/remmina/files/patch-FreeRDP-Remmina-b6a55ae

@@ -44,7 +44,7 @@ diff -urN CMakeLists.txt CMakeLists.txt
  if(NOT BUILD_SHARED_LIBS)
      set(BUILD_SHARED_LIBS ON)
  endif()
-@@ -77,34 +71,35 @@
+@@ -77,34 +71,34 @@
  include_directories(.)
  include_directories(remmina/include)
  
@@ -91,7 +91,7 @@ diff -urN CMakeLists.txt CMakeLists.txt
 -
  configure_file(${CMAKE_CURRENT_SOURCE_DIR}/config.h.in ${CMAKE_CURRENT_SOURCE_DIR}/config.h)
  
- install(DIRECTORY include/remmina DESTINATION include/remmina FILES_MATCHING PATTERN "*.h")
+-install(DIRECTORY include/remmina DESTINATION include/remmina FILES_MATCHING PATTERN "*.h")
 diff -urN COPYING COPYING
 --- COPYING	1970-01-01 10:00:00.000000000 +1000
 +++ COPYING	2014-01-08 02:31:52.000000000 +1100

net/remmina/pkg-plist

@@ -44,4 +44,3 @@ share/icons/hicolor/scalable/apps/remmina.svg
 %%NLS%%share/locale/tr/LC_MESSAGES/remmina.mo
 %%NLS%%share/locale/uk/LC_MESSAGES/remmina.mo
 %%NLS%%share/locale/zh_CN/LC_MESSAGES/remmina.mo
-@dir include/remmina