Merge branch 'js/test-git-installed'

Test fix for Windows.

* js/test-git-installed:
  tests: explicitly use `test-tool.exe` on Windows

t/test-lib.sh

@@ -1154,7 +1154,7 @@ test -d "$GIT_BUILD_DIR"/templates/blt || {
 	error "You haven't built things yet, have you?"
 }
 
-if ! test -x "$GIT_BUILD_DIR"/t/helper/test-tool
+if ! test -x "$GIT_BUILD_DIR"/t/helper/test-tool$X
 then
 	echo >&2 'You need to build test-tool:'
 	echo >&2 'Run "make t/helper/test-tool" in the source (toplevel) directory'