git version generation fixes

- Remove the `version` file created for the tarball after the tarball is finished
- Use the builtin type instead of which.

build_tools/git_version_gen.sh

@@ -12,7 +12,7 @@ DEF_VER=2.0.GIT
 if test -f version
 then
 	VN=$(cat version) || VN="$DEF_VER"
-elif test -d .git -o -f .git && which git >/dev/null
+elif test -d .git -o -f .git && type git >/dev/null
 then
 	VN=$(git describe --tags --dirty 2>/dev/null)
 else

build_tools/make_tarball.sh

@@ -42,6 +42,7 @@ ln -s "$wd" "$prefix"
 gnutar --append --file="$path" "$prefix"/user_doc/html
 gnutar --append --file="$path" "$prefix"/share/man
 gnutar --append --file="$path" "$prefix"/version
+rm -f "$prefix"/version
 rm -f "$prefix"
 
 # gzip it