xxhash: add test

src/xxhash-test.c

@@ -0,0 +1,12 @@
+/*
+ * This file is part of MXE.
+ * See index.html for further information.
+ */
+
+#include <xxhash.h>
+
+int main() {
+    XXH32_state_t* state = XXH32_createState();
+    XXH32_freeState(state);
+    return 0;
+}

src/xxhash.mk

@@ -31,4 +31,9 @@ define $(PKG)_BUILD
      echo 'Description: xxHash'; \
      echo 'Libs: -lxxhash';) \
      > '$(PREFIX)/$(TARGET)/lib/pkgconfig/$(PKG).pc'
+
+    '$(TARGET)-gcc' \
+        -W -Wall -Werror -ansi -pedantic \
+        '$(2).c' -o '$(PREFIX)/$(TARGET)/bin/test-$(PKG).exe' \
+        `'$(TARGET)-pkg-config' $(PKG) --cflags --libs`
 endef