perf print_insn: Include sys/types.h for ssize_t

print_insn.h declares fprintf_insn_asm() with an ssize_t return type but
does not include the header defining that type. This causes builds where
stdio.h does not provide ssize_t to fail when compiling util/print_insn.c:

  util/print_insn.h:21:1: error: unknown type name 'ssize_t'

Include sys/types.h so the header provides its own dependency for ssize_t.

Fixes: 218c200f67 ("perf script: Consolidate capstone print functions")
Reviewed-by: James Clark <james.clark@linaro.org>
Signed-off-by: Florian Fainelli <florian.fainelli@broadcom.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/util/print_insn.h

@@ -4,6 +4,7 @@
 
 #include <stddef.h>
 #include <stdio.h>
+#include <sys/types.h>
 
 #include <linux/types.h>