wrapper.h: move declarations for wrapper.c functions from cache.h

Signed-off-by: Elijah Newren <newren@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

t/helper/test-delta.c

@@ -12,6 +12,7 @@
 #include "git-compat-util.h"
 #include "delta.h"
 #include "cache.h"
+#include "wrapper.h"
 
 static const char usage_str[] =
 	"test-tool delta (-d|-p) <from_file> <data_file> <out_file>";

t/helper/test-fsmonitor-client.c

@@ -9,6 +9,7 @@
 #include "fsmonitor-ipc.h"
 #include "thread-utils.h"
 #include "trace2.h"
+#include "wrapper.h"
 
 #ifndef HAVE_FSMONITOR_DAEMON_BACKEND
 int cmd__fsmonitor_client(int argc, const char **argv)

t/helper/test-read-cache.c

@@ -2,6 +2,7 @@
 #include "test-tool.h"
 #include "cache.h"
 #include "config.h"
+#include "wrapper.h"
 
 int cmd__read_cache(int argc, const char **argv)
 {