Fix for equality comparable operator== infinite loop issue

Summary:
This is a patch that we are carrying in boost internally - D37196783

This is an open issue with C++20 - https://fburl.com/wtm7yhrm and the suggestion is to add explicit member candidates.

More details in D37196783

Reviewed By: peygar, zechengh09

Differential Revision: D58957227

fbshipit-source-id: d48e218c26199180d192f3a174e54f900770aae3

build/fbcode_builder/manifests/boost

@@ -62,6 +62,7 @@ boost-static
 [build]
 builder = boost
 job_weight_mib = 512
+patchfile = boost_comparator_operator_fix.patch
 
 [b2.args]
 --with-atomic

build/fbcode_builder/patches/boost_comparator_operator_fix.patch

@@ -0,0 +1,11 @@
+diff --git a/boost/serialization/strong_typedef.hpp b/boost/serialization/strong_typedef.hpp
+--- a/boost/serialization/strong_typedef.hpp
++++ b/boost/serialization/strong_typedef.hpp
+@@ -44,6 +44,7 @@
+     operator const T&() const {return t;}                                                                        \
+     operator T&() {return t;}                                                                                    \
+     bool operator==(const D& rhs) const {return t == rhs.t;}                                                     \
++    bool operator==(const T& lhs) const {return t == lhs;}                                                       \
+     bool operator<(const D& rhs) const {return t < rhs.t;}                                                       \
+ };
+