lib/string/: Move string-related files to string/ subdir

Signed-off-by: Alejandro Colomar <alx@kernel.org>

tests/unit/Makefile.am

@@ -60,7 +60,7 @@ test_strncpy_LDADD = \
     $(NULL)
 
 test_strtcpy_SOURCES = \
-    ../../lib/strtcpy.c \
+    ../../lib/string/strtcpy.c \
     test_strtcpy.c \
     $(NULL)
 test_strtcpy_CFLAGS = \
@@ -73,7 +73,7 @@ test_strtcpy_LDADD = \
     $(NULL)
 
 test_xasprintf_SOURCES = \
-    ../../lib/sprintf.c \
+    ../../lib/string/sprintf.c \
     test_xasprintf.c \
     $(NULL)
 test_xasprintf_CFLAGS = \

tests/unit/test_strncpy.c

@@ -15,7 +15,7 @@
 #include <cmocka.h>
 
 #include "sizeof.h"
-#include "strncpy.h"
+#include "string/strncpy.h"
 
 
 static void test_STRNCPY_trunc(void **state);

tests/unit/test_strtcpy.c

@@ -15,7 +15,7 @@
 #include <cmocka.h>
 
 #include "sizeof.h"
-#include "strtcpy.h"
+#include "string/strtcpy.h"
 
 
 static void test_STRTCPY_trunc(void **state);

tests/unit/test_xasprintf.c

@@ -15,7 +15,7 @@
 #include <stdint.h>  // Required by <cmocka.h>
 #include <cmocka.h>
 
-#include "sprintf.h"
+#include "string/sprintf.h"
 
 
 #define assert_unreachable()  assert_true(0)