new regex wrapper requires wmakeLnInclude OSspecific/.. before making Pstream

src/Allwmake

@@ -2,7 +2,8 @@
 cd ${0%/*} || exit 1    # run from this directory
 set -x
 
-( cd OpenFOAM && wmakeLnInclude -f . )
+wmakeLnInclude -f OpenFOAM
+wmakeLnInclude -f OSspecific/$WM_OS
 ( cd Pstream && ./Allwmake )
 
 wmake libo  OSspecific/$WM_OS