cpp_int serial txt files moved to a new sub-folder /serial_txts and include files boost-no-inspect to avoid complaints from inspect.exe.

I:\boost\libs\multiprecision\test\test_cpp_int_deserial.cpp uses boost::filesystem::path root("./serial_txts");

All tests pass on MSVC14.2 but one skipped???

[CI SKIP]

test/test_cpp_int_deserial.cpp

@@ -25,7 +25,7 @@
 #include <boost/filesystem.hpp>
 #include <boost/filesystem/fstream.hpp>
 
-boost::filesystem::path root;
+boost::filesystem::path root("./serial_txts");
 
 template <class T>
 void test64()