[Reproducers] Mark partial specialization as inline

The overload and/or template specialization are regular functions and
should be marked inline when implemented in the header. Writing the
previous commit message should've made that obvious but I was already
overthinking it. This will fix the windows bot.

llvm-svn: 355657

lldb/include/lldb/Utility/ReproducerInstrumentation.h

@@ -37,7 +37,8 @@ void log_append(llvm::raw_string_ostream &ss, const T *t) {
   ss << t;
 }
 
-template <> void log_append<char>(llvm::raw_string_ostream &ss, const char *t) {
+inline template <>
+void log_append<char>(llvm::raw_string_ostream &ss, const char *t) {
   ss << t;
 }