Kernel: Add _SC_CLK_TCK to sysconf.

Unbreaks the hatari port.

Kernel/Syscalls/sysconf.cpp

@@ -44,6 +44,9 @@ KResultOr<long> Process::sys$sysconf(int name)
         return TTY_NAME_MAX;
     case _SC_GETPW_R_SIZE_MAX:
         return 4096; // idk
+    case _SC_CLK_TCK:
+        // FIXME: should return Number of clock intervals per second for times()
+        return 100; // seems to be 100 on x86_64
     default:
         return EINVAL;
     }

Kernel/UnixTypes.h

@@ -63,6 +63,7 @@ enum {
     _SC_TTY_NAME_MAX,
     _SC_PAGESIZE,
     _SC_GETPW_R_SIZE_MAX,
+    _SC_CLK_TCK,
 };
 
 #define PERF_EVENT_SAMPLE 0

Userland/Libraries/LibC/unistd.h

@@ -177,6 +177,7 @@ enum {
     _SC_TTY_NAME_MAX,
     _SC_PAGESIZE,
     _SC_GETPW_R_SIZE_MAX,
+    _SC_CLK_TCK,
 };
 
 #define _SC_NPROCESSORS_CONF _SC_NPROCESSORS_CONF