Create common/os/libos.la file


git-svn-id: svn://svn.code.sf.net/p/tigervnc/code/trunk@4996 3789f03b-4d11-0410-bbf8-ca57d06f2519
diff --git a/common/os/CMakeLists.txt b/common/os/CMakeLists.txt
index 84c259d..39d5c10 100644
--- a/common/os/CMakeLists.txt
+++ b/common/os/CMakeLists.txt
@@ -6,3 +6,7 @@
   w32tiger.c
   os.cxx
   tls.cxx)
+
+if(UNIX)
+  libtool_create_control_file(os)
+endif()