[PATCH] Use wc instead of awk to count subtrees in t0090-cache-tree

The awk statements previously used in this test weren't compatible
with the native versions of awk on Solaris:

echo "dir" | /bin/awk -v c=0 '$1 {++c} END {print c}'
awk: syntax error near line 1
awk: bailing out near line 1

echo "dir" | /usr/xpg4/bin/awk -v c=0 '$1 {++c} END {print c}'
0

And with GNU awk for comparison:
echo "dir" | /opt/csw/gnu/awk -v c=0 '$1 {++c} END {print c}'
1

Instead of modifying the awk code to work, use wc -w instead as that
is both adequate and simpler.

Signed-off-by: Ben Walton <redacted>
---
 t/t0090-cache-tree.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/t/t0090-cache-tree.sh b/t/t0090-cache-tree.sh
index 067f4c6..f2b1c9c 100755
--- a/t/t0090-cache-tree.sh
+++ b/t/t0090-cache-tree.sh

@@ -22,7 +22,7 @@ generate_expected_cache_tree_rec () {
 	# ls-files might have foo/bar, foo/bar/baz, and foo/bar/quux
 	# We want to count only foo because it's the only direct child
 	subtrees=$(git ls-files|grep /|cut -d / -f 1|uniq) &&
-	subtree_count=$(echo "$subtrees"|awk -v c=0 '$1 {++c} END {print c}') &&
+	subtree_count=$(echo "$subtrees"|wc -w) &&
 	entries=$(git ls-files|wc -l) &&
 	printf "SHA $dir (%d entries, %d subtrees)\n" "$entries" "$subtree_count" &&
 	for subtree in $subtrees

-- 
1.9.1