Fix a lot of man7 links to be more specific.

Bug: https://github.com/android/ndk/issues/2113
Change-Id: Ifc3add91c39422985c63e895dc32443b8f736c9d
diff --git a/libc/include/string.h b/libc/include/string.h
index 79aac91..a0a7cc4 100644
--- a/libc/include/string.h
+++ b/libc/include/string.h
@@ -160,7 +160,7 @@
 #endif
 
 /**
- * [strerrorname_np(3)](https://man7.org/linux/man-pages/man3/strerrordesc_np.3.html)
+ * [strerrorname_np(3)](https://man7.org/linux/man-pages/man3/strerrorname_np.3.html)
  * returns the name of the errno constant corresponding to its argument.
  * `strerrorname_np(38)` would return "ENOSYS", because `ENOSYS` is errno 38. This
  * is mostly useful for error reporting in cases where a string like "ENOSYS" is