build: autoconf: Activate options for standard types

These are POSIX standard types

And therefore should be present in any POSIX compliant runtime.

Signed-off-by: Philip Prindeville <[email protected]>
Link: https://github.com/openwrt/openwrt/pull/15952
Signed-off-by: Hauke Mehrtens <[email protected]>

include/site/linux

@@ -66,9 +66,12 @@ ac_cv_sctp=no
 ac_cv_sys_restartable_syscalls=yes
 ac_cv_time_r_type=POSIX
 ac_cv_type_suseconds_t=yes
+ac_cv_size_t=yes
+ac_cv_ssize_t=yes
 ac_cv_uchar=no
 ac_cv_uint=yes
 ac_cv_uint64_t=yes
+ac_cv_uintptr_t=yes
 ac_cv_ulong=yes
 ac_cv_ushort=yes
 ac_cv_va_copy=C99