perf: Alias SYS_futex with SYS_futex_time64 on 32-bit arches with 64bit time_t

glibc does not define SYS_futex for 32bit architectures using 64bit
time_t e.g. riscv32, therefore perf fails to compile as it does not find
SYS_futex in C library headers, define it to SYS_futex_time64 when it
exists

Upstream-Status: Pending
Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Bruce Ashfield <bruce.ashfield@gmail.com>