arm64: fix clang ICE on Windows for zdot_thunderx2t99.c

Guard .align directive to avoid internal compiler error on
AArch64 Windows with clang.

See: llvm/llvm-project#149547
See: #5076

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: vtjnash

kernel/arm64/zdot_thunderx2t99.c

@@ -236,7 +236,10 @@ static void zdot_compute(BLASLONG n, FLOAT *x, BLASLONG inc_x, FLOAT *y, BLASLON
 	"	cmp	"J", xzr			\n"
 	"	beq	3f //dot_kernel_F1		\n"
 
+/* https://github.com/llvm/llvm-project/issues/149547 */
+#if !(defined(__clang__) && defined(OS_WINDOWS))
 	"	.align 5				\n"
+#endif
 	"2: //dot_kernel_F:				\n"
 	"	"KERNEL_F"				\n"
 	"	subs	"J", "J", #1			\n"