multiple definitions: case network static inline

Weird linker errors like

dist/build/cbits/ancilData.dyn_o: In function `my_inet_ntoa':
ancilData.c:(.text+0x0): multiple definition of `my_inet_ntoa'

The fix is something like:

-# elif defined(__GNUC__)
+# elif defined(__GNUC_GNU_INLINE__)
 #  define INLINE extern inline
 # else
 #  define INLINE inline

• network-2.3.2.1 fixes http://hdiff.luite.com/cgit/network/diff?id=2.3.2.1&id2=2.3.2.0
• following 2.4.0.0 regresses http://hdiff.luite.com/cgit/network/diff?id=2.4.0.0&id2=2.3.2.1
• and fixed in 2.4.2.1 http://hdiff.luite.com/cgit/network/diff?id=2.4.2.1&id2=2.4.2.0

See https://github.com/haskell-infra/hackage-trustees/issues/67