patch 9.0.0860: MS-Windows: windres fails with clang 15.0.4

Problem:    MS-Windows: windres fails with clang 15.0.4.
Solution:   Use llvm-windres. (John Marriott)
diff --git a/src/Make_cyg_ming.mak b/src/Make_cyg_ming.mak
index 37dc260..ad48a4d 100644
--- a/src/Make_cyg_ming.mak
+++ b/src/Make_cyg_ming.mak
@@ -227,7 +227,11 @@
 ifeq ($(UNDER_CYGWIN),yes)
 WINDRES := $(CROSS_COMPILE)windres
 else
+ifeq ($(findstring clang,$(CC)),)
 WINDRES := windres
+else
+WINDRES := llvm-windres
+endif
 endif
 
 # Get the default ARCH.