[jit_kernel] Fix missing JIT kernel namespaces (#34106)

Co-authored-by: BBuf <1182563586@qq.com>

python/sglang/kernels/jit/csrc/diffusion/modulate_scale_shift.cuh

@@ -24,6 +24,8 @@
 
 #include <cstdint>
 
+namespace sglang {
+
 namespace sglang_modulate_scale_shift {
 
 namespace {
@@ -219,3 +221,5 @@ struct ModulateScaleShiftKernel {
 };
 
 }  // namespace sglang_modulate_scale_shift
+
+}  // namespace sglang

python/sglang/kernels/jit/csrc/moe/align_single_token.cuh

@@ -17,7 +17,7 @@
 
 #include <cstdint>
 
-namespace {
+namespace sglang {
 
 struct AlignSingleTokenParams {
   const int32_t* __restrict__ topk_ids;  // [1, topk]
@@ -104,4 +104,4 @@ struct AlignSingleTokenKernel {
   }
 };
 
-}  // namespace
+}  // namespace sglang