glib_stubs: undefine g_free

[tormath1]

otherwise compiler tries to expand the macro to a function. Noticed with glib >= 2.84.4

In file included from /build/amd64-usr/usr/include/glib-2.0/glib/glist.h:34,
                 from /build/amd64-usr/usr/include/glib-2.0/glib/ghash.h:36,
                 from /build/amd64-usr/usr/include/glib-2.0/glib.h:52,
                 from ../lib/rpcChannel/glib_stubs.c:28:
/build/amd64-usr/usr/include/glib-2.0/glib/gmem.h:172:27: error: expected declaration specifiers or '...' before '(' token
  172 |   (__builtin_object_size ((mem), 0) != ((size_t) - 1)) ?                       \
      |                           ^
../lib/rpcChannel/glib_stubs.c:38:6: note: in expansion of macro 'g_free'
   38 | void g_free(void *p) { free(p); }
      |      ^~~~~~
/build/amd64-usr/usr/include/glib-2.0/glib/gmem.h:172:34: error: expected declaration specifiers or '...' before numeric constant
  172 |   (__builtin_object_size ((mem), 0) != ((size_t) - 1)) ?                       \
      |                                  ^
../lib/rpcChannel/glib_stubs.c:38:6: note: in expansion of macro 'g_free'
   38 | void g_free(void *p) { free(p); }
      |      ^~~~~~
/build/amd64-usr/usr/include/glib-2.0/glib/gmem.h:172:37: error: expected ')' before '!=' token
  172 |   (__builtin_object_size ((mem), 0) != ((size_t) - 1)) ?                       \
      |                                     ^~
../lib/rpcChannel/glib_stubs.c:38:6: note: in expansion of macro 'g_free'
   38 | void g_free(void *p) { free(p); }

[legal-compliance-bot]

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[tormath1]

I have read the CLA Document and I hereby sign the CLA for this and all future contributions.

[zeha]

@aabusair maybe this could be merged now that the CLA issue is solved?