Fix Xcode 15 beta linker detection. Closes #11958.

mesonbuild/linkers/detect.py

diff --git a/mesonbuild/linkers/detect.py b/mesonbuild/linkers/detect.py
index 60be10f..e09a28e 100644
--- a/mesonbuild/linkers/detect.py
+++ b/mesonbuild/linkers/detect.py
@@ -194,7 +194,7 @@
         _, newo, newerr = Popen_safe_logged(cmd, msg='Detecting Apple linker via')
 
         for line in newerr.split('\n'):
-            if 'PROJECT:ld' in line:
+            if 'PROJECT:ld' in line or 'PROJECT:dyld' in line:
                 v = line.split('-')[1]
                 break
         else: