two new symbols: half-bowtie and another north arrow variant (merge from devbr6)

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@49352 15284696-431f-4ddb-bdfa-cd5b030d7da7

lib/symbol/symbol/extra/n_arrow3

@@ -0,0 +1,48 @@
+VERSION 1.0
+BOX -1.5 -1.5 1.5 1.5
+POLYGON
+ COLOR NONE
+ RING
+  LINE
+  0 3
+  0 7.5
+  1.5 1.5
+  0 3
+ END
+END
+POLYGON
+ COLOR NONE
+ FCOLOR 255 255 255
+ RING
+  LINE
+  0 3
+  0 7.5
+  -1.5 1.5
+  0 3
+ END
+END
+POLYGON
+ FCOLOR NONE
+ RING
+  LINE
+  0 3
+  -1.5 1.5
+  0 7.5
+  1.5 1.5
+  0 3
+ END
+END
+POLYGON
+ RING
+  LINE
+  0 3
+  0 -7.5
+ END
+END
+POLYGON
+ RING
+  LINE
+  -1.5 0
+  1.5 0
+ END
+END

lib/symbol/symbol/geology/strike_half-bowtie

@@ -0,0 +1,17 @@
+VERSION 1.0
+BOX -0.5 -0.5 0.5 0.5
+STRING
+  LINE
+    -1 0
+     1 0
+  END
+END
+POLYGON
+  RING
+    LINE
+      -0.25 0.5
+      0 0
+      0.25 0.5
+    END
+  END
+END