make "bold monospace" font spec platform specific, since OS X doesn't seem to like/provide such a thing

git-svn-id: svn://localhost/ardour2/branches/3.0@13637 d708f5d6-7413-0410-9779-e7cbd77b26cf

gtk2_ardour/ardour3_fonts.rc.in

@@ -57,7 +57,7 @@ style "large_bold_text"
 
 style "large_bold_mono_text"
 {
- 	font_name = "bold monospace @FONT_BIGGER@"
+ 	font_name = "@BOLD_MONOSPACE@ @FONT_BIGGER@"
 }
 
 style "larger_text"
@@ -72,7 +72,7 @@ style "massive_text"
 
 style "monospace massive_text"
 {
-  	font_name = "bold monospace @FONT_MASSIVE@"
+  	font_name = "@BOLD_MONOSPACE@ @FONT_MASSIVE@"
 }
 
 style "larger_bold_text"

gtk2_ardour/wscript

@@ -511,7 +511,8 @@ def build(bld):
                 'LARGE' : '18',
                 'LARGER' : '28',
                 'HUGER' : '36',
-                'MASSIVE' : '60'
+                'MASSIVE' : '60',
+                'BOLD_MONOSPACE' : 'monospace'
         }
     else: # Linux/X11 fonts
         basefont = '' # unspecified - use system defaults
@@ -525,8 +526,9 @@ def build(bld):
                 'LARGE' : '18',
                 'LARGER' : '24',
                 'HUGER' : '34',
-                'MASSIVE' : '60'
-        }
+                'MASSIVE' : '60',
+                'BOLD_MONOSPACE' : 'bold monospace'
+       }
 
     # Set up font substitution dictionary
     # @FONT_XXXX@