[PATCH v2 2/8] osdep: Ignore 'unguarded-availability-new' warnings on macOS Catalina

["Philippe Mathieu-Daudé via" <qemu-devel@nongnu.org>]

When building with GCC on macOS Catalina we get 2254 times:

  include/qemu/osdep.h:780:5: warning: 'pthread_jit_write_protect_np' is only available on macOS 11.0 or newer [-Wunguarded-availability-new]
      pthread_jit_write_protect_np(true);
      ^~~~~~~~~~~~~~~~~~~~~~~~~~~~

Fix by using a stricker toolchain version low range, replacing
MAC_OS_X_VERSION_MAX_ALLOWED by MAC_OS_X_VERSION_MIN_REQUIRED.

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
---
 include/qemu/osdep.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/qemu/osdep.h b/include/qemu/osdep.h
index aecd2f66ec..1e7a002339 100644
--- a/include/qemu/osdep.h
+++ b/include/qemu/osdep.h
@@ -774,7 +774,7 @@ size_t qemu_get_host_physmem(void);
  * for the current thread.
  */
 #if defined(MAC_OS_VERSION_11_0) && \
-    MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_VERSION_11_0
+    MAC_OS_X_VERSION_MIN_REQUIRED >= MAC_OS_VERSION_11_0
 static inline void qemu_thread_jit_execute(void)
 {
     pthread_jit_write_protect_np(true);
-- 
2.34.1