bftpd: Fix implicit int in `configure`

%ci:no-build

packages/bftpd/build.sh

@@ -11,7 +11,6 @@ TERMUX_PKG_BUILD_IN_SRC=true
 TERMUX_PKG_EXTRA_CONFIGURE_ARGS="
 --mandir=$TERMUX_PREFIX/share/man
 "
-TERMUX_PKG_ENABLE_CLANG16_PORTING=false
 
 TERMUX_PKG_CONFFILES="etc/bftpd.conf"
 TERMUX_PKG_RM_AFTER_INSTALL="var/log/bftpd.log"

packages/bftpd/configure-clang16.patch

@@ -0,0 +1,12 @@
+https://github.com/termux/termux-packages/issues/15852
+
+--- a/configure
++++ b/configure
+@@ -661,6 +661,7 @@
+ #line 662 "configure"
+ #include "confdefs.h"
+ 
++int
+ main(){return(0);}
+ EOF
+ if { (eval echo configure:667: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then