(libretro/Vulkan) Fix glslang shader-related crashes

dep/glslang/OGLCompilersDLL/InitializeDll.cpp

@@ -158,6 +158,7 @@ bool DetachProcess()
 
     OS_FreeTLSIndex(ThreadInitializeIndex);
     ThreadInitializeIndex = OS_INVALID_TLS_INDEX;
+    DeinitializePoolIndex();
 
     return success;
 }

dep/glslang/glslang/Include/InitializeGlobals.h

@@ -38,6 +38,7 @@
 namespace glslang {
 
 bool InitializePoolIndex();
+bool DeinitializePoolIndex();
 
 } // end namespace glslang
 

dep/glslang/glslang/MachineIndependent/PoolAlloc.cpp

@@ -65,6 +65,15 @@ bool InitializePoolIndex()
     return true;
 }
 
+bool DeinitializePoolIndex()
+{
+    if (PoolIndex == OS_INVALID_TLS_INDEX)
+        return false;
+    OS_FreeTLSIndex(PoolIndex);
+    PoolIndex = OS_INVALID_TLS_INDEX;
+    return true;
+}
+
 //
 // Implement the functionality of the TPoolAllocator class, which
 // is documented in PoolAlloc.h.

dep/glslang/glslang/MachineIndependent/ShaderLang.cpp

@@ -1429,6 +1429,7 @@ int ShFinalize()
     glslang::HlslScanContext::deleteKeywordMap();
 #endif
 
+    DetachProcess();
     return 1;
 }