types.h: time_t as int64_t

The following code will generate warnings:
auto now = time(nullptr);
auto last_active_time = GetEventService(self->ctx_)->getActiveTime();
if (last_active_time + 60 * 1000 / 1000 <= now) {

src/ams/../controller/controller_timer.h: In lambda function:
src/ams/../controller/controller_timer.h:117:57: warning: comparison of integer expressions of different signedness: 'long long int' and 'long long unsigned int' [-Wsign-compare]
  117 |                 if (last_active_time + 60 * 1000 / 1000 <= now) {

reference:
https://www.gnu.org/software/libc/manual/html_node/Time-Types.html

On POSIX-conformant systems, time_t is an integer type.

Signed-off-by: ligd <[email protected]>

include/sys/types.h

@@ -251,10 +251,10 @@ typedef uint16_t     sa_family_t;
 
 #ifdef CONFIG_SYSTEM_TIME64
 typedef uint64_t     clock_t;
-typedef uint64_t     time_t;         /* Holds time in seconds */
+typedef int64_t      time_t;         /* Holds time in seconds */
 #else
 typedef uint32_t     clock_t;
-typedef uint32_t     time_t;         /* Holds time in seconds */
+typedef int32_t      time_t;         /* Holds time in seconds */
 #endif
 typedef int          clockid_t;      /* Identifies one time base source */
 typedef FAR void    *timer_t;        /* Represents one POSIX timer */