Squashed 'external/stb/stb/' content from commit c39c7023e

git-subtree-dir: external/stb/stb
git-subtree-split: c39c7023ebb833ce099750fe35509aca5662695e

tests/resample_test_c.c

@@ -0,0 +1,8 @@
+#define STB_IMAGE_RESIZE_IMPLEMENTATION
+#define STB_IMAGE_RESIZE_STATIC
+#include "stb_image_resize.h"
+
+// Just to make sure it will build properly with a c compiler
+
+int main() {
+}