bison: no longer fuse the similar case clauses

* build-aux/bin/ Don't use fuse-switch.
* build-aux/bin/fuse-switch: Die when you did wrong.
1 job for lz/fix-build in 2 minutes and 36 seconds (queued for 1 second)
Status Name Job ID Coverage
failed debian-stable-gcc #27206


Name Stage Failure
debian-stable-gcc Test
make[3]: Nothing to be done for 'all-am'.
make[3]: Leaving directory '/builds/tiger/nolimips/distrib'
make[2]: Leaving directory '/builds/tiger/nolimips/distrib'
make[2]: Entering directory '/builds/tiger/nolimips'
make[2]: Leaving directory '/builds/tiger/nolimips'
make[1]: Leaving directory '/builds/tiger/nolimips'
make[1]: *** [Makefile:463: all-recursive] Error 1
make: *** [Makefile:393: all] Error 2
ERROR: Job failed: exit code 1