Add "set TMP=%CD%" to the start of each msvc script output by releasetest_data.tcl. Otherwise, since binaries compiled with SQLITE_TEST all choose the same sequence of pseudo-random numbers, collisions between temp file names cause errors when running multiple tests in parallel.

FossilOrigin-Name: f5d0436d8dc650cadb61a5fe76fd1a0d68dabba54ff0c2a8c138f9dfbdab1c3f

test/releasetest_data.tcl

@@ -546,6 +546,7 @@ proc main_script {args} {
     set makecmd    "nmake /f %SRCDIR%\\Makefile.msc TOP=%SRCDIR% $target "
     append makecmd "\"CFLAGS=$cflags\" \"OPTS=$opts\" $makeOpts"
 
+    puts "set TMP=%CD%"
     puts $makecmd
   }
 }