SL-18837: Don't use LLDir, use NamedTempFile::temp_path.

Remove llcommon circular dependency on llfilesystem, which doesn't work for
this case anyway.

indra/llcommon/CMakeLists.txt

@@ -308,7 +308,7 @@ if (LL_TESTS)
   LL_ADD_INTEGRATION_TEST(llleap "" "${test_libs}")
   LL_ADD_INTEGRATION_TEST(llmainthreadtask "" "${test_libs}")
   LL_ADD_INTEGRATION_TEST(llpounceable "" "${test_libs}")
-  LL_ADD_INTEGRATION_TEST(llprocess "" "${test_libs};llfilesystem")
+  LL_ADD_INTEGRATION_TEST(llprocess "" "${test_libs}")
   LL_ADD_INTEGRATION_TEST(llprocessor "" "${test_libs}")
   LL_ADD_INTEGRATION_TEST(llprocinfo "" "${test_libs}")
   LL_ADD_INTEGRATION_TEST(llrand "" "${test_libs}")

indra/llcommon/tests/llprocess_test.cpp

@@ -30,7 +30,6 @@
 #include "../test/namedtempfile.h"
 #include "../test/catch_and_store_what_in.h"
 #include "stringize.h"
-#include "../llfilesystem/lldir.h"
 #include "llsdutil.h"
 #include "llevents.h"
 #include "llstring.h"
@@ -152,11 +151,9 @@ struct PythonProcessLauncher
     /// Launch Python script; verify that it launched
     void launch()
     {
-        std::string logpath{ gDirUtilp->getExpandedFilename(LL_PATH_LOGS, "apr.log") };
+        std::string logpath{ NamedTempFile::temp_path("apr", ".log").string() };
 #if LL_WINDOWS
         _putenv_s("APR_LOG", logpath.c_str());
-#else
-        setenv("APR_LOG", logpath.c_str(), 1);
 #endif
         try
         {