proposed-migration for sbcl 2:2.3.7-2

sbcl 2:2.3.7-2 is stuck in -proposed. It FTBFS on arm64 and armhf.

On arm64, we see:

cc -g -Wl,--export-dynamic -no-pie -o sbcl sbcl.o -ldl -Wl,-no-as-needed -lpthread -lzstd -lm
/usr/bin/ld: /tmp/ccRWCKeN.ltrans1.ltrans.o: in function `interrupt_handle_now':
/<<PKGBUILDDIR>>/src/runtime/funcall.c:71:(.text+0x488c): undefined reference to `call_into_lisp'
/usr/bin/ld: /tmp/ccRWCKeN.ltrans1.ltrans.o: in function `interrupt_handle_now_handler':
/<<PKGBUILDDIR>>/src/runtime/funcall.c:71:(.text+0x4f5c): undefined reference to `call_into_lisp'
/usr/bin/ld: /tmp/ccRWCKeN.ltrans1.ltrans.o: in function `maybe_gc':
/<<PKGBUILDDIR>>/src/runtime/funcall.c:52:(.text+0x5b04): undefined reference to `call_into_lisp'
/usr/bin/ld: /<<PKGBUILDDIR>>/src/runtime/funcall.c:45:(.text+0x5bf4): undefined reference to `call_into_lisp'
/usr/bin/ld: /tmp/ccRWCKeN.ltrans1.ltrans.o: in function `interrupt_internal_error':
/<<PKGBUILDDIR>>/src/runtime/funcall.c:61:(.text+0x6570): undefined reference to `call_into_lisp'
/usr/bin/ld: /tmp/ccRWCKeN.ltrans1.ltrans.o:/<<PKGBUILDDIR>>/src/runtime/funcall.c:61: more undefined references to `call_into_lisp' follow
/usr/bin/ld: /tmp/ccRWCKeN.ltrans0.ltrans.o: in function `gc_heap_exhausted_error_or_lose':
/<<PKGBUILDDIR>>/src/runtime/alloc.c:744:(.text+0x6fa8): undefined reference to `do_pending_interrupt'
/usr/bin/ld: /tmp/ccRWCKeN.ltrans2.ltrans.o: in function `call_cmd':
/<<PKGBUILDDIR>>/src/runtime/funcall.c:45:(.text+0x7d68): undefined reference to `call_into_lisp'
/usr/bin/ld: /<<PKGBUILDDIR>>/src/runtime/funcall.c:52:(.text+0x7e78): undefined reference to `call_into_lisp'
/usr/bin/ld: /<<PKGBUILDDIR>>/src/runtime/funcall.c:61:(.text+0x7eb0): undefined reference to `call_into_lisp'
/usr/bin/ld: /<<PKGBUILDDIR>>/src/runtime/funcall.c:71:(.text+0x7ed8): undefined reference to `call_into_lisp'
/usr/bin/ld: /tmp/ccRWCKeN.ltrans2.ltrans.o: in function `new_thread_trampoline':
/<<PKGBUILDDIR>>/src/runtime/funcall.c:52:(.text+0x8d48): undefined reference to `call_into_lisp'
/usr/bin/ld: /tmp/ccRWCKeN.ltrans2.ltrans.o:/<<PKGBUILDDIR>>/src/runtime/funcall.c:45: more undefined references to `call_into_lisp' follow
collect2: error: ld returned 1 exit status
make[2]: *** [GNUmakefile:102: sbcl] Error 1
make[2]: Leaving directory '/<<PKGBUILDDIR>>/src/runtime'
Command exited with non-zero status 2
23.16user 2.51system 0:18.84elapsed 136%CPU (0avgtext+0avgdata 92964maxresident)k
0inputs+106200outputs (0major+518532minor)pagefaults 0swaps
make[1]: *** [debian/rules:53: override_dh_auto_build] Error 2
make[1]: Leaving directory '/<<PKGBUILDDIR>>'
make: *** [debian/rules:45: binary-arch] Error 2
dpkg-buildpackage: error: debian/rules binary-arch subprocess returned exit status 2

This looks just like bug 2006524. This package was recently sync'd from Debian, so we lost that delta.

On armhf, the failure is:

debugger invoked on a TYPE-ERROR:
  The value
    794015453029597185
  is not of type
    (UNSIGNED-BYTE 32)
  when setting slot SB-THREAD::OBSERVED-INTERNAL-REAL-TIME-DELTA-SEC of structure SB-THREAD:THREAD

Type HELP for debugger help, or (SB-EXT:EXIT) to exit from SBCL.

restarts (invokable by number or by possibly-abbreviated name):
  0: [ABORT] Exit from the current thread.

(GET-INTERNAL-REAL-TIME)
0]

debugger invoked on a SB-INT:SIMPLE-CONTROL-ERROR:
  attempt to THROW to a tag that does not exist: SB-IMPL::%END-OF-THE-WORLD

Type HELP for debugger help, or (SB-EXT:EXIT) to exit from SBCL.

restarts (invokable by number or by possibly-abbreviated name):
  0: [ABORT] Exit from the current thread.

(EXIT :CODE 1 :ABORT NIL :TIMEOUT NIL)
0]
Command exited with non-zero status 1
0.18user 0.31system 0:00.50elapsed 99%CPU (0avgtext+0avgdata 39536maxresident)k
0inputs+0outputs (0major+9851minor)pagefaults 0swaps
make[1]: *** [debian/rules:53: override_dh_auto_build] Error 1
make[1]: Leaving directory '/<<PKGBUILDDIR>>'
make: *** [debian/rules:45: binary-arch] Error 2
dpkg-buildpackage: error: debian/rules binary-arch subprocess returned exit status 2