[CRT] Refactor CMake files

sdk/lib/crt/stdio/stdio.cmake

@@ -0,0 +1,22 @@
+
+list(APPEND CRT_STDIO_SOURCE
+    stdio/_flsbuf.c
+    stdio/_flswbuf.c
+    stdio/access.c
+    stdio/file.c
+    stdio/find.c
+    stdio/find64.c
+    stdio/findi64.c
+    stdio/fmode.c
+    stdio/perror.c
+    stdio/popen.c
+    stdio/stat.c
+    stdio/stat64.c
+    stdio/waccess.c
+    stdio/wfind.c
+    stdio/wfind64.c
+    stdio/wfindi64.c
+    stdio/wpopen.c
+    stdio/wstat.c
+    stdio/wstat64.c
+)