Fixes errors such as
Traceback (most recent call last):
File "C:\Users\...\cairo\test\make-cairo-test-constructors.py", line 19, in <module>
for l in f.readlines():
File "c:\python39\lib\encodings\cp1253.py", line 23, in decode
return codecs.charmap_decode(input,self.errors,decoding_table)[0]
UnicodeDecodeError: 'charmap' codec can't decode byte 0x98 in position 6694: character maps to <undefined>
on non-English-language Windows locales/installations.
Same as autotools does. Arguably it would be better to do
it the other way round and generate cairo-version.h from
the version in meson.build or configure.ac but for now
let's do this so it's at least in sync with the autotools
build and only one file has to be edited for releases.
