update build info for cavestats, and make cavestats a link to ewither amd64 or i386 version

noinfo/cavestats

@@ -0,0 +1 @@
+cavestats_i386

noinfo/cavestats.build

@@ -2,8 +2,7 @@
 
 apt-get source survex
 sudo apt-get build-dep survex
-pushd
-cd survex-*
+pushd survex-*
 dpkg-buildpackage
 cp cavestats.c survex-*/src
 cd src
@@ -12,4 +11,4 @@ gcc -DHAVE_CONFIG_H -I. -I.. -DIMG_HOSTED   -Wall -W -Wunused -Wshadow
 -Wredundant-decls -Wnested-externs      -Wcast-align -g -O2 -O2 -MT
 3dtopos.o -MD -MP namecmp.o img.o useful.o cmdline.o message.o
 filename.o osdepend.o z_getopt.o getopt1.o -o cavestats cavestats.c -lm
-mv cavestats ../../
+mv cavestats ../../