uClibc_stdio.h: change the guard used to include stdio-lock.h

My intention was to get rid of uClibc_mutex.h completely on install, but it
introduces other dependencies. It affects anyway only the installed case.

Note: since NPTL was added, the FILE structure changes between the build
and the installed version. I wanted to fix this by the earlier commit.
Reverting the behaviour to IMHO a wrong one.

While there, remove libc-lock.h and stdio-lock.h on install (even though
glibc has them -wrongly- installed).

Reported-by: Tony Wu <tung7970@gmail.com>
Signed-off-by: Peter S. Mazinger <ps.m@gmx.net>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>

Makefile.in

@@ -226,6 +226,8 @@ HEADERS_RM- := \
 	bits/kernel_sigaction.h \
 	bits/kernel_stat.h \
 	bits/kernel_types.h \
+	bits/libc-lock.h \
+	bits/stdio-lock.h \
 	bits/syscalls.h \
 	bits/syscalls-common.h \
 	bits/uClibc_fpmax.h \

libc/sysdeps/linux/common/bits/uClibc_stdio.h

@@ -205,7 +205,7 @@ typedef _IO_cookie_io_functions_t cookie_io_functions_t;
 /**********************************************************************/
 
 #if defined __UCLIBC_HAS_THREADS__ && !defined __UCLIBC_IO_MUTEX
-# ifdef __UCLIBC_HAS_THREADS_NATIVE__
+# ifdef __USE_STDIO_FUTEXES__
 #  include <bits/stdio-lock.h>
 #  define __UCLIBC_IO_MUTEX(M) _IO_lock_t M
 # else