tools/bison: update to 3.7.1

Update GNU bison to version 3.7.1.
Refresh patches.

Signed-off-by: Hannu Nyman <[email protected]>

tools/bison/Makefile

@@ -7,11 +7,11 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=bison
-PKG_VERSION:=3.5.1
+PKG_VERSION:=3.7.1
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.xz
 PKG_SOURCE_URL:=@GNU/$(PKG_NAME)
-PKG_HASH:=3e7e097bd9709a2d5e40e69446b74b149733b3de864fadb7a9b54eca7b2a4dd0
+PKG_HASH:=55c215521a13982a9bee68cd42eed51a65713f96c530a739a57de4438ac1bb69
 
 HOST_BUILD_PARALLEL:=1
 

tools/bison/patches/100-fix-gets-removal.patch

@@ -1,6 +1,6 @@
 --- a/lib/stdio.in.h
 +++ b/lib/stdio.in.h
-@@ -778,14 +778,6 @@ _GL_WARN_ON_USE (getline, "getline is un
+@@ -816,14 +816,6 @@ _GL_WARN_ON_USE (getline, "getline is un
  # endif
  #endif