XawM: Add X11 build dependencies

x11/XawM/Portfile

@@ -17,12 +17,11 @@ homepage	http://siag.nu
 master_sites    ${homepage}/pub/widgets/
 checksums	md5 a81372046d0a7ebeb8c3d90e75d58828
 
+depends_build       port:xorg-libX11 \
+                    port:xorg-libXext \
+                    port:xorg-libXmu \
+                    port:xorg-libXt \
+                    port:xorg-xproto
+
 # Ancient configure script doesn't like it when CC contains multiple words.
 configure.ccache    no
-
-# This lib actually doesn't depend on libX11 ... ??? -JH:
-# otool -L work/destroot/opt/local/lib/libXawM.1.0.0.dylib
-#work/destroot/opt/local/lib/libXawM.1.0.0.dylib:
-#	/opt/local/lib/libXawM.1.dylib (compatibility version 2.0.0, current version 2.0.0)
-#	/usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 111.1.1)
-#	/usr/lib/libgcc_s.1.dylib (compatibility version 1.0.0, current version 1.0.0)