StdLib: Move the declarations for ffs() and bzero() from extern.h to strings.h.

Signed-off-by: darylm503
Reviewed-by: jljusten


git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@12654 6f19259b-4bc3-4df7-8a09-765794883524

StdLib/LibC/Uefi/select.c

@@ -53,11 +53,10 @@
 
 #include <stdlib.h>
 #include <unistd.h>
-#include <string.h>
+#include <strings.h>
 #include <sys/poll.h>
 #include <sys/param.h>
 #include <sys/time.h>
-#include  <extern.h>      /* For ffs() */
 #ifndef KERNEL
 #define KERNEL
 #include <errno.h>