random hack to make fossil link. evidently it is sloppy about declaring externs.

Reference: /n/atom/patch/applied/fossexthack
Date: Thu Apr  3 23:25:22 CES 2014
Signed-off-by: quanstro@quanstro.net

--- /sys/src/cmd/fossil/fs.h	Thu Apr  3 23:25:22 2014
+++ /sys/src/cmd/fossil/fs.h	Thu Apr  3 23:25:22 2014
@@ -15,7 +15,7 @@
 };
 
 extern char *currfsysname;
-extern char *foptname;
+char *foptname;
 
 void	fsClose(Fs*);
 int	fsEpochLow(Fs*, u32int);
--- /sys/src/cmd/fossil/9h.h	Thu Apr  3 23:25:22 2014
+++ /sys/src/cmd/fossil/9h.h	Thu Apr  3 23:25:22 2014
@@ -255,4 +255,4 @@
 /*
  * fossil.c
  */
-extern int Dflag;
+int Dflag;