[source] tools/flex: add autoreconf

[LEDE Commits]

blogic pushed a commit to source.git, branch master:
https://git.lede-project.org/6b127d86390f85e92e59f3dba04fa585efb3b2c5

commit 6b127d86390f85e92e59f3dba04fa585efb3b2c5
Author: John Crispin <john at phrozen.org>
AuthorDate: Thu Jul 6 08:57:27 2017 +0200

    tools/flex: add autoreconf
    
    build blows up on latest debian due to automake mismatch
    
    Signed-off-by: John Crispin <john at phrozen.org>
---
 tools/flex/Makefile | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tools/flex/Makefile b/tools/flex/Makefile
index 1398b1a..ca9aa98 100644
--- a/tools/flex/Makefile
+++ b/tools/flex/Makefile
@@ -15,6 +15,7 @@ PKG_HASH:=e87aae032bf07c26f85ac0ed3250998c37621d95f8bd748b31f15b33c45ee995
 
 HOST_FIXUP:=autoreconf
 HOST_BUILD_PARALLEL:=1
+HOST_FIXUP:=autoreconf
 
 include $(INCLUDE_DIR)/host-build.mk