Added support for fstatvfs.

diff --git a/configure b/configure
index ba51f64..cf04fbd 100755
--- a/configure
+++ b/configure
@@ -15981,6 +15981,8 @@
 
 
 
+
+
 for ac_func in \
 	_lwp_create \
 	_lwp_self \
@@ -15995,6 +15997,8 @@
 	clone \
 	finite \
 	fpclass \
+	fstatfs \
+	fstatvfs \
 	ftruncate \
 	ftruncate64 \
 	futimes \