Add a "fork" of musl as //fusl.
This is musl verbatim at d5f8394f6ea9549607567bd92de12a2446c15614.
See http://www.musl-libc.org/.
R=kulakowski@chromium.org
Review URL: https://codereview.chromium.org/1573973002 .
diff --git a/fusl/src/string/wcsspn.c b/fusl/src/string/wcsspn.c
new file mode 100644
index 0000000..4320d8f
--- /dev/null
+++ b/fusl/src/string/wcsspn.c
@@ -0,0 +1,8 @@
+#include <wchar.h>
+
+size_t wcsspn(const wchar_t *s, const wchar_t *c)
+{
+ const wchar_t *a;
+ for (a=s; *s && wcschr(c, *s); s++);
+ return s-a;
+}
