perf env: Move perf_env out of header.h and session.c into separate object

Since it can be used separately from 'perf_session' and 'perf_header',
move it to separate include file and object, next csets will try to move
a perf_env__init() routine.

Tested-by: Wang Nan <wangnan0@huawei.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Borislav Petkov <bp@suse.de>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kan Liang <kan.liang@intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-ff2rw99tsn670y1b6gxbwdsi@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
diff --git a/tools/perf/util/header.h b/tools/perf/util/header.h
index 975d803..05f27cb 100644
--- a/tools/perf/util/header.h
+++ b/tools/perf/util/header.h
@@ -7,7 +7,7 @@
 #include <linux/bitmap.h>
 #include <linux/types.h>
 #include "event.h"
-
+#include "env.h"
 
 enum {
 	HEADER_RESERVED		= 0,	/* always cleared */
@@ -66,37 +66,6 @@
 int perf_file_header__read(struct perf_file_header *header,
 			   struct perf_header *ph, int fd);
 
-struct cpu_topology_map {
-	int	socket_id;
-	int	core_id;
-};
-
-struct perf_env {
-	char			*hostname;
-	char			*os_release;
-	char			*version;
-	char			*arch;
-	int			nr_cpus_online;
-	int			nr_cpus_avail;
-	char			*cpu_desc;
-	char			*cpuid;
-	unsigned long long	total_mem;
-
-	int			nr_cmdline;
-	int			nr_sibling_cores;
-	int			nr_sibling_threads;
-	int			nr_numa_nodes;
-	int			nr_pmu_mappings;
-	int			nr_groups;
-	char			*cmdline;
-	const char		**cmdline_argv;
-	char			*sibling_cores;
-	char			*sibling_threads;
-	char			*numa_nodes;
-	char			*pmu_mappings;
-	struct cpu_topology_map	*cpu;
-};
-
 struct perf_header {
 	enum perf_header_version	version;
 	bool				needs_swap;