Updated build scripts in unix/ for new directory layout.


git-svn-id: svn://svn.code.sf.net/p/tigervnc/code/trunk@617 3789f03b-4d11-0410-bbf8-ca57d06f2519
diff --git a/unix/common.mk b/unix/common.mk
new file mode 100644
index 0000000..95a8753
--- /dev/null
+++ b/unix/common.mk
@@ -0,0 +1,2 @@
+COMMON = @top_srcdir@/../common
+TOP = @top_srcdir@