d3dcompiler: Make D3DAssemble a private export.

dlls/d3dcompiler_41/d3dcompiler_41.spec

-@ stdcall D3DAssemble(ptr long str ptr ptr long ptr ptr)
+@ stdcall -private D3DAssemble(ptr long str ptr ptr long ptr ptr)
 @ stub DebugSetMute
 @ stdcall D3DCompile(ptr long str ptr ptr str str long long ptr ptr)
 @ stub D3DDisassemble10Effect(ptr long ptr)

dlls/d3dcompiler_42/d3dcompiler_42.spec

-@ stdcall D3DAssemble(ptr long str ptr ptr long ptr ptr)
+@ stdcall -private D3DAssemble(ptr long str ptr ptr long ptr ptr)
 @ stub DebugSetMute
 @ stdcall D3DCompile(ptr long str ptr ptr str str long long ptr ptr)
 @ stub D3DDisassemble10Effect(ptr long ptr)

dlls/d3dcompiler_43/d3dcompiler_43.spec

-@ stdcall D3DAssemble(ptr long str ptr ptr long ptr ptr)
+@ stdcall -private D3DAssemble(ptr long str ptr ptr long ptr ptr)
 @ stub DebugSetMute
 @ stdcall D3DCompile(ptr long str ptr ptr str str long long ptr ptr)
 @ stub D3DCompressShaders

dlls/d3dcompiler_46/d3dcompiler_46.spec

-@ stdcall D3DAssemble(ptr long str ptr ptr long ptr ptr)
+@ stdcall -private D3DAssemble(ptr long str ptr ptr long ptr ptr)
 @ stdcall D3DCompile(ptr long str ptr ptr str str long long ptr ptr)
 @ stdcall D3DCompile2(ptr long str ptr ptr str str long long long ptr long ptr ptr)
 @ stdcall D3DCompileFromFile(wstr ptr ptr str str long long ptr ptr)

dlls/d3dcompiler_47/d3dcompiler_47.spec

-@ stdcall D3DAssemble(ptr long str ptr ptr long ptr ptr)
+@ stdcall -private D3DAssemble(ptr long str ptr ptr long ptr ptr)
 @ stdcall D3DCompile(ptr long str ptr ptr str str long long ptr ptr)
 @ stdcall D3DCompile2(ptr long str ptr ptr str str long long long ptr long ptr ptr)
 @ stdcall D3DCompileFromFile(wstr ptr ptr str str long long ptr ptr)