opt: cygfuse: can build cygport from working tree (make cygport)

opt/cygfuse/fuse.cygport

@@ -6,8 +6,8 @@ SUMMARY="WinFsp-FUSE compatibility layer"
 DESCRIPTION="WinFsp-FUSE enables FUSE file systems to be run on Cygwin."
 HOMEPAGE="http://www.secfs.net/winfsp/"
 
-SRC_URI="https://github.com/billziss-gh/winfsp/archive/master.tar.gz"
-SRC_DIR=winfsp-master
+SRC_URI=${CYGPORT_SRC_URI:-"https://github.com/billziss-gh/winfsp/archive/master.tar.gz"}
+SRC_DIR=${CYGPORT_SRC_DIR:-winfsp-master}
 
 src_compile()
 {
@@ -33,4 +33,4 @@ src_install()
     doins fuse.pc
 }
 
-RESTRICT=postinst-doc
+RESTRICT="strip postinst-doc"