cpprest: fix build failures on 32bit systems, by reverting two upstream commits

Signed-off-by: Khem Raj <raj.khem@gmail.com>

meta-oe/recipes-support/cpprest/cpprest/revert-9b670e5b33dfdbd501d618cd7e7498148ffbd559.patch

@@ -0,0 +1,26 @@
+Description: revert upstream bugfix (see:https://github.com/Microsoft/cpprestsdk/issues/1090)
+Last-Update: 2019-03-28
+
+--- cpprest-2.10.12.orig/Release/src/utilities/asyncrt_utils.cpp
++++ cpprest-2.10.12/Release/src/utilities/asyncrt_utils.cpp
+@@ -1393,16 +1393,15 @@ utility::seconds __cdecl timespan::xml_d
+     return utility::seconds(numSecs);
+ }
+ 
+-static const char c_allowed_chars[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
+-static const int chars_count = static_cast<int>(sizeof(c_allowed_chars) - 1);
++static const utility::char_t c_allowed_chars[] =
++    _XPLATSTR("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789");
+ 
+ utility::string_t nonce_generator::generate()
+ {
+-    std::uniform_int_distribution<> distr(0, chars_count - 1);
++    std::uniform_int_distribution<> distr(0, static_cast<int>(sizeof(c_allowed_chars) / sizeof(utility::char_t)) - 1);
+     utility::string_t result;
+     result.reserve(length());
+-    std::generate_n(std::back_inserter(result), length(),
+-		[&] { return static_cast<utility::char_t>(c_allowed_chars[distr(m_random)]); });
++    std::generate_n(std::back_inserter(result), length(), [&]() { return c_allowed_chars[distr(m_random)]; });
+     return result;
+ }
+