recompile bootstrap for Gerbil v01.18-rc1

[vyzo]

Closes #926

Log:

vyzo@dellicious:~/gerbil/src$ rm -rf bootstrap/*
vyzo@dellicious:~/gerbil/src$ gxc -d bootstrap -s -S -O gerbil/runtime/{gambit,system,util,loader,control,mop,error,thread,syntax,eval,repl,init}.ss gerbil/runtime.ss
vyzo@dellicious:~/gerbil/src$ gxc -d bootstrap -s -S -O -no-ssxi gerbil/prelude/core.ss
vyzo@dellicious:~/gerbil/src$ gxc -d bootstrap -s -S gerbil/prelude/gambit.ss
vyzo@dellicious:~/gerbil/src$ gxc -d bootstrap -s -S -O gerbil/expander/{common,stx,core,top,module,compile,root,stxcase}.ss gerbil/expander.ss
vyzo@dellicious:~/gerbil/src$ gxc  -d bootstrap -s -S -O gerbil/compiler/{base,compile,optimize-base,optimize-xform,optimize-top,optimize-spec,optimize-ann,optimize-call,optimize,driver,ssxi}.ss gerbil/compiler.ss
vyzo@dellicious:~/gerbil/src$ cp gerbil/prelude/core.ssxi.ss bootstrap/gerbil
vyzo@dellicious:~/gerbil/src$ gerbil -v
Gerbil 0.17.0-343-g2bef30f6 on Gambit v4.9.5-40-g24201248

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