[PATCH] * bootstrap: Fix unportable expr usage.

[Ralf Wildenhues]

---
Hi Jim,

This fixes a bootstrap failure on FreeBSD due to:

$ expr --gnulib-srcdir=foo : '--gnulib-srcdir=\(.*\)'
expr: illegal option -- -
usage: expr [-e] expression

Cheers,
Ralf

 bootstrap |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/bootstrap b/bootstrap
index 6226973..faa9bab 100755
--- a/bootstrap
+++ b/bootstrap
@@ -165,7 +165,7 @@ do
     usage
     exit;;
   --gnulib-srcdir=*)
-    GNULIB_SRCDIR=`expr "$option" : '--gnulib-srcdir=\(.*\)'`;;
+    GNULIB_SRCDIR=`expr "X$option" : 'X--gnulib-srcdir=\(.*\)'`;;
   --skip-po)
     SKIP_PO=t;;
   --force)
-- 
1.5.5.40.g4cdda