Fix unit tests for opensolaris

tests/unittests/torture_misc.c

@@ -1,5 +1,8 @@
+
 #include <sys/types.h>
 #ifndef _WIN32
+
+#define _POSIX_PTHREAD_SEMANTICS
 #include <pwd.h>
 #endif
 

tests/unittests/torture_options.c

@@ -1,6 +1,7 @@
 #define LIBSSH_STATIC
 
 #ifndef _WIN32
+#define _POSIX_PTHREAD_SEMANTICS
 # include <pwd.h>
 #endif