Ninja: Revert accidental LINK_WHAT_YOU_USE impl for static libraries

In commit d7159f9591, (Ninja: Fix LINK_WHAT_YOU_USE link flag placement,
2021-06-24), we fixed usage of -Wl,--no-as-needed to override
-Wl,--as-needed from LDFLAGS. However, that change also passes
-Wl,--no-as-needed to `ar`, which is incorrect flag for `ar`.

Let's check the target type before passing down the flags.

Fixes: #22487

1 files changed, 4 insertions, 0 deletions

diff --git a/Tests/RunCMake/LinkWhatYouUse/foo.c b/Tests/RunCMake/LinkWhatYouUse/foo.c
new file mode 100644
index 0000000..c83d856
--- /dev/null
+++ b/Tests/RunCMake/LinkWhatYouUse/foo.c
@@ -0,0 +1,4 @@
+int foo(void)
+{
+  return 0;
+}