clover: Store map result into a temporary vector in clCreateProgramWithBinary.

This avoids the inefficient multiple evaluation of the map result in
the code below.  It should cause no functional changes.

Tested-by: "Dorrington, Albert" <albert.dorrington@lmco.com>

src/gallium/state_trackers/clover/api/program.cpp

@@ -69,7 +69,7 @@ clCreateProgramWithBinary(cl_context d_ctx, cl_uint n,
       throw error(CL_INVALID_DEVICE);
 
    // Deserialize the provided binaries,
-   auto result = map(
+   std::vector<std::pair<cl_int, module>> result = map(
       [](const unsigned char *p, size_t l) -> std::pair<cl_int, module> {
          if (!p || !l)
             return { CL_INVALID_VALUE, {} };