Apparently the MinGW header files don't declare it, despite it being
part of liblphlapi.a. More confusingly, it didn't break anything for
64-bit builds because the compiler used an implicit declaration that
matched the link-time symbol name. Alas, no such luck for 32-bit
builds, since the implicit declaration was not annotated with the @48
stdcall argument stack size, so the build died at link time.
The tower of patches and hacks grows higher. Ideally, we'll just drop
support for JDK 7 soon and clean this mess up a bit, but TravisCI
still hasn't gotten the memo that it's dead, so we muddle onward.
I've tested this on Windows, but not yet Linux or OS X. Wanted to get
a PR before I move on to that.
