Update changelog for hslua 1.0.3.2
## Changelog
+
+### 1.0.3.2
+
+Released 2019-08-21.
+
+- Added flag to use hardcoded values for registry keys: The names
+ of the registry keys used to store package information are
+ available as CPP values from file lauxlib.h since Lua 5.3.4;
+ compiling HsLua against older Lua versions was not possible, as
+ those values were expected to exist.
+
+ The respective values are now hardcoded into HsLua, and a new
+ flag `hardcode-reg-key` is introduced, which will cause the use
+ of these hardcoded values instead of those defined in
+ lauxlib.h. Using this flag makes it possible to compile hslua
+ against all Lua 5.3.* versions.
+
+- Added missing C files for benchmarking to list of
+ *extra-source-files*.
+
### 1.0.3.1
Released 2019-05-08.
