Shrink macro block external pins.

* Bug: In cumulus/plugins.macro.Macro, external west/east segments where
    slightly too long and conflicted with the METAL2 blockage.

cumulus/src/plugins/alpha/block/spares.py

@@ -927,9 +927,9 @@ class Spares ( object ):
         with UpdateSession():
             self.quadTree = QuadTree.create( self )
             #self._addCapTies()
-            print( "X Centers of the QuadTree leaf" )
+            trace( 540, "\tX Centers of the QuadTree leaf\n" )
             for x in self.quadTree.rleafX:
-                print( '| {}'.format(DbU.getValueString(x) ))
+                trace( 540, '\t| {}\n'.format(DbU.getValueString(x) ))
         trace( 540, '-' )
 
     def rshowPoolUse ( self ):

cumulus/src/plugins/alpha/macro/macro.py

@@ -233,7 +233,7 @@ class Macro ( object ):
                                               , yOngrid
                                               , wwidth
                                               , xMin
-                                              , xMax - ppitch
+                                              , xMin + ppitch + ppitch/2
                                               )
                 NetExternalComponents.setExternal( horizontal )
             for component in eastPins: