solaris systems build fix (#425)

src/override/memcpy.cc

@@ -11,7 +11,7 @@ using namespace snmalloc;
 
 // glibc lacks snprintf_l
 #if defined(__linux__) || defined(__OpenBSD__) || defined(__DragonFly__) || \
-  defined(__HAIKU__)
+  defined(__HAIKU__) || defined(__sun)
 #  define snprintf_l(buf, size, loc, msg, ...) \
     snprintf(buf, size, msg, __VA_ARGS__)
 // Windows has it with an underscore prefix

src/test/func/memory/memory.cc

@@ -4,9 +4,9 @@
 #include <test/setup.h>
 #include <test/xoroshiro.h>
 #include <unordered_set>
-#if defined(__linux__) && !defined(SNMALLOC_QEMU_WORKAROUND)
+#if (defined(__linux__) || defined(__sun)) && !defined(SNMALLOC_QEMU_WORKAROUND)
 /*
- * We only test allocations with limited AS on linux for now.
+ * We only test allocations with limited AS on linux and Solaris for now.
  * It should be a good representative for POSIX systems.
  * QEMU `setrlimit64` does not behave as the same as native linux,
  * so we need to exclude it from such tests.