perf tools: Include errno.h where needed

Removing it from util.h, part of an effort to disentangle the includes
hell, that makes changes to util.h or something included by it to cause
a complete rebuild of the tools.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/n/tip-ztrjy52q1rqcchuy3rubfgt2@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/tests/attr.c

@@ -18,6 +18,7 @@
  * permissions. All the event text files are stored there.
  */
 
+#include <errno.h>
 #include <inttypes.h>
 #include <stdlib.h>
 #include <stdio.h>

tools/perf/tests/backward-ring-buffer.c

@@ -8,6 +8,7 @@
 #include <sys/prctl.h>
 #include "tests.h"
 #include "debug.h"
+#include <errno.h>
 
 #define NR_ITERS 111
 

tools/perf/tests/bpf.c

@@ -1,3 +1,4 @@
+#include <errno.h>
 #include <stdio.h>
 #include <sys/epoll.h>
 #include <util/util.h>

tools/perf/tests/builtin-test.c

@@ -3,6 +3,7 @@
  *
  * Builtin regression testing command: ever growing number of sanity tests
  */
+#include <errno.h>
 #include <unistd.h>
 #include <string.h>
 #include "builtin.h"

tools/perf/tests/code-reading.c

@@ -1,3 +1,4 @@
+#include <errno.h>
 #include <linux/kernel.h>
 #include <linux/types.h>
 #include <inttypes.h>

tools/perf/tests/event-times.c

@@ -1,4 +1,5 @@
 #include <linux/compiler.h>
+#include <errno.h>
 #include <inttypes.h>
 #include <string.h>
 #include "tests.h"

tools/perf/tests/evsel-roundtrip-name.c

@@ -3,6 +3,7 @@
 #include "parse-events.h"
 #include "tests.h"
 #include "debug.h"
+#include <errno.h>
 #include <linux/kernel.h>
 
 static int perf_evsel__roundtrip_cache_name_test(void)

tools/perf/tests/hists_link.c

@@ -9,6 +9,7 @@
 #include "thread.h"
 #include "parse-events.h"
 #include "hists_common.h"
+#include <errno.h>
 #include <linux/kernel.h>
 
 struct sample {

tools/perf/tests/mmap-basic.c

@@ -1,3 +1,4 @@
+#include <errno.h>
 #include <inttypes.h>
 /* For the CLR_() macros */
 #include <pthread.h>

tools/perf/tests/openat-syscall-all-cpus.c

@@ -1,3 +1,4 @@
+#include <errno.h>
 #include <inttypes.h>
 /* For the CPU_* macros */
 #include <pthread.h>

tools/perf/tests/openat-syscall-tp-fields.c

@@ -5,6 +5,7 @@
 #include "thread_map.h"
 #include "tests.h"
 #include "debug.h"
+#include <errno.h>
 
 #ifndef O_DIRECTORY
 #define O_DIRECTORY    00200000

tools/perf/tests/openat-syscall.c

@@ -1,3 +1,4 @@
+#include <errno.h>
 #include <inttypes.h>
 #include <api/fs/tracing_path.h>
 #include <linux/err.h>

tools/perf/tests/parse-events.c

@@ -5,6 +5,7 @@
 #include "tests.h"
 #include "debug.h"
 #include "util.h"
+#include <errno.h>
 #include <linux/kernel.h>
 #include <linux/hw_breakpoint.h>
 #include <api/fs/fs.h>

tools/perf/tests/perf-record.c

@@ -1,3 +1,4 @@
+#include <errno.h>
 #include <inttypes.h>
 /* For the CLR_() macros */
 #include <pthread.h>

tools/perf/tests/pmu.c

@@ -2,6 +2,7 @@
 #include "pmu.h"
 #include "util.h"
 #include "tests.h"
+#include <errno.h>
 #include <linux/kernel.h>
 
 /* Simulated format definitions. */

tools/perf/tests/sdt.c

@@ -1,3 +1,4 @@
+#include <errno.h>
 #include <stdio.h>
 #include <sys/epoll.h>
 #include <util/util.h>

tools/perf/tests/sw-clock.c

@@ -1,3 +1,4 @@
+#include <errno.h>
 #include <inttypes.h>
 #include <unistd.h>
 #include <stdlib.h>

tools/perf/tests/switch-tracking.c

@@ -1,5 +1,6 @@
 #include <sys/time.h>
 #include <sys/prctl.h>
+#include <errno.h>
 #include <time.h>
 #include <stdlib.h>
 

tools/perf/tests/task-exit.c

@@ -4,6 +4,7 @@
 #include "cpumap.h"
 #include "tests.h"
 
+#include <errno.h>
 #include <signal.h>
 
 static int exited;