Merge pull request #64 from dignati/freebsd-sigstksz

Fix SIGSTKSZ for FreeBSD

Author: alexcrichton

src/unix/bsd/freebsdlike/freebsd.rs

@@ -1,5 +1,6 @@
 pub const PTHREAD_STACK_MIN: ::size_t = 2048;
 pub const KERN_PROC_PATHNAME: ::c_int = 12;
+pub const SIGSTKSZ: ::size_t = 2048 /* MINSIGSTKSZ */ + 32768;
 
 extern {
     pub fn __error() -> *mut ::c_int;