[PATCH perf/core ] [BUGFIX] perf build-test: Add linux/export.h and lib/rbtree.c to MANIFEST

[Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>]

Since linux/export.h and lib/rbtree.c are not listed in MANIFEST,
`make build-test` always fails as below (Note, to get these messages,
I've removed /dev/null redirect in tests/perf-targz-src-pkg);

  ----
    CC       util/hweight.o
  ../../lib/hweight.c:1:26: fatal error: linux/export.h:
  No such file or directory
   #include <linux/export.h>
                          ^
  compilation terminated.
  make[3]: *** [util/hweight.o] Error 1
  ----

  ----
    GEN      common-cmds.h
  make[1]: *** No rule to make target `../../lib/rbtree.c',
  needed by `python/perf.so'.  Stop.
  make[1]: *** Waiting for unfinished jobs....
  ----

Signed-off-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
---
 tools/perf/MANIFEST |    2 ++
 1 file changed, 2 insertions(+)

diff --git a/tools/perf/MANIFEST b/tools/perf/MANIFEST
index 09dc0aa..adce9de 100644
--- a/tools/perf/MANIFEST
+++ b/tools/perf/MANIFEST
@@ -58,7 +58,9 @@ include/linux/list.h
 include/linux/hash.h
 include/linux/stringify.h
 lib/hweight.c
+lib/rbtree.c
 include/linux/swab.h
+include/linux/export.h
 arch/*/include/asm/unistd*.h
 arch/*/include/uapi/asm/unistd*.h
 arch/*/include/uapi/asm/perf_regs.h