databases/firebird30-server: fix build with lld 17

Building databases/firebird30-server with lld 17 results in the
following link error:

  c++  -O2 -pipe  -DAMD64 -fstack-protector-strong -isystem /usr/local/include -fno-strict-aliasing   -isystem /usr/local/include -std=gnu++03   -fstack-protector-strong -L/usr/local/lib  -D_THREAD_SAFE   -Wl,-rpath,/usr/local/lib -Wl,-rpath,/usr/local/libexec/firebird/intl  -Wl,--version-script,empty.vers -Wl,-rpath,../gen/firebird/lib /wrkdirs/share/dim/ports/databases/firebird30-client/work/Firebird-3.0.10.33601-0/temp/Release/gpre/c_cxx.o /wrkdirs/share/dim/ports/databases/firebird30-client/work/Firebird-3.0.10.33601-0/temp/Release/gpre/cmd.o /wrkdirs/share/dim/ports/databases/firebird30-client/work/Firebird-3.0.10.33601-0/temp/Release/gpre/cme.o /wrkdirs/share/dim/ports/databases/firebird30-client/work/Firebird-3.0.10.33601-0/temp/Release/gpre/cmp.o /wrkdirs/share/dim/ports/databases/firebird30-client/work/Firebird-3.0.10.33601-0/temp/Release/gpre/exp.o /wrkdirs/share/dim/ports/databases/firebird30-client/work/Firebird-3.0.10.33601-0/temp/Release/gpre/gpre.o /wrkdirs/share/dim/ports/databases/firebird30-client/work/Firebird-3.0.10.33601-0/temp/Release/gpre/hsh.o /wrkdirs/share/dim/ports/databases/firebird30-client/work/Firebird-3.0.10.33601-0/temp/Release/gpre/int_cxx.o /wrkdirs/share/dim/ports/databases/firebird30-client/work/Firebird-3.0.10.33601-0/temp/Release/gpre/jrdmet.o /wrkdirs/share/dim/ports/databases/firebird30-client/work/Firebird-3.0.10.33601-0/temp/Release/gpre/movg.o /wrkdirs/share/dim/ports/databases/firebird30-client/work/Firebird-3.0.10.33601-0/temp/Release/gpre/msc.o /wrkdirs/share/dim/ports/databases/firebird30-client/work/Firebird-3.0.10.33601-0/temp/Release/gpre/obj_cxx.o /wrkdirs/share/dim/ports/databases/firebird30-client/work/Firebird-3.0.10.33601-0/temp/Release/gpre/par.o /wrkdirs/share/dim/ports/databases/firebird30-client/work/Firebird-3.0.10.33601-0/temp/Release/gpre/pat.o /wrkdirs/share/dim/ports/databases/firebird30-client/work/Firebird-3.0.10.33601-0/temp/Release/gpre/sqe.o /wrkdirs/share/dim/ports/databases/firebird30-client/work/Firebird-3.0.10.33601-0/temp/Release/gpre/sql.o /wrkdirs/share/dim/ports/databases/firebird30-client/work/Firebird-3.0.10.33601-0/temp/Release/gpre/boot/gpre_meta_boot.o /wrkdirs/share/dim/ports/databases/firebird30-client/work/Firebird-3.0.10.33601-0/temp/Release/yvalve/gds.o /wrkdirs/share/dim/ports/databases/firebird30-client/work/Firebird-3.0.10.33601-0/temp/Release/common.a -o /wrkdirs/share/dim/ports/databases/firebird30-client/work/Firebird-3.0.10.33601-0/gen/Release/firebird/bin/gpre_boot -L/wrkdirs/share/dim/ports/databases/firebird30-client/work/Firebird-3.0.10.33601-0/gen/Release/firebird/lib -liconv -lm  -lpthread -lcurses
  ld: error: version script assignment of 'global' to symbol '_IO_stdin_used' failed: symbol not defined
  c++: error: linker command failed with exit code 1 (use -v to see invocation)

The mentioned symbol is only relevant for Linux. Remove it from the
builds/posix/vers.sh.in script that generates the linker version script.

PR:		274335
Approved by:	maintainer timeout (2 weeks)
MFH:		2023Q4

databases/firebird30-server/files/patch-builds_posix_vers.sh.in

@@ -0,0 +1,10 @@
+--- builds/posix/vers.sh.in.orig	2022-06-07 08:18:52 UTC
++++ builds/posix/vers.sh.in
+@@ -57,7 +57,6 @@ platform_linux() {
+ 		echo "${TAB}$i;"
+ 	done
+
+-	echo "${TAB}_IO_stdin_used;"
+ 	echo 'local:'
+ 	echo "${TAB}*;"
+ 	echo '};'