Build failed with GCC14

OS: Arch Linux
GCC: 14.2.1
Error:
```
/home/cwt/Projects/bianbu/k1x-jpu/sample/main_enc_test.c: In function ‘TestEncoder’:
/home/cwt/Projects/bianbu/k1x-jpu/sample/main_enc_test.c:271:20: error: implicit declaration of function ‘gettimeofday’ [-Wimplicit-function-declaration]
  271 |     if (profiling) gettimeofday(&start_time, 0);
      |                    ^~~~~~~~~~~~
make[2]: *** [CMakeFiles/jpu_enc_test.dir/build.make:79: CMakeFiles/jpu_enc_test.dir/sample/main_enc_test.c.o] Error 1
make[1]: *** [CMakeFiles/Makefile2:159: CMakeFiles/jpu_enc_test.dir/all] Error 2
make: *** [Makefile:136: all] Error 2
```
This error occurs because the gettimeofday() function is defined in the sys/time.h header, but the header hasn't been included in your source file.
The following patch will resolve the error.
```
diff -r 6045481e177c sample/main_dec_test.c
--- a/sample/main_dec_test.c    Thu Aug 29 20:58:10 2024 +0800
+++ b/sample/main_dec_test.c    Tue Dec 10 15:51:08 2024 +0700
@@ -28,6 +28,7 @@
 #include <stdlib.h>
 #include <string.h>
 #include <strings.h>
+#include <sys/time.h>
 
 #include "BufferAllocatorWrapper.h"
 #include "jpuapi.h"
diff -r 6045481e177c sample/main_enc_test.c
--- a/sample/main_enc_test.c    Thu Aug 29 20:58:10 2024 +0800
+++ b/sample/main_enc_test.c    Tue Dec 10 15:51:08 2024 +0700
@@ -10,6 +10,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <sys/mman.h>
+#include <sys/time.h>
 #include <sys/types.h>
 #include <unistd.h>
```

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