[Misc] (3rdparty): Update glslang to 15.4.0

include/glslang/Include/PoolAlloc.h

@@ -61,6 +61,8 @@
 // class as the allocator (second) template argument.
 //
 
+#include "visibility.h"
+
 #include <cstddef>
 #include <cstring>
 #include <vector>
@@ -179,6 +181,7 @@ public:
     // Call allocate() to actually acquire memory.  Returns nullptr if no memory
     // available, otherwise a properly aligned pointer to 'numBytes' of memory.
     //
+    GLSLANG_EXPORT_FOR_TESTS
     void* allocate(size_t numBytes);
 
     //
@@ -255,6 +258,7 @@ private:
 // different times.  But a simple use is to have a global pop
 // with everyone using the same global allocator.
 //
+GLSLANG_EXPORT_FOR_TESTS
 extern TPoolAllocator& GetThreadPoolAllocator();
 void SetThreadPoolAllocator(TPoolAllocator* poolAllocator);
 
@@ -289,6 +293,7 @@ public:
     template<class Other>
         pool_allocator(const pool_allocator<Other>& p) : allocator(p.getAllocator()) { }
 
+    GLSLANG_EXPORT_FOR_TESTS
     pointer allocate(size_type n) {
         return reinterpret_cast<pointer>(getAllocator().allocate(n * sizeof(T))); }
     pointer allocate(size_type n, const void*) {