Use global_asm for setjmp instead

Cargo.lock

include/setjmp.h

src/setjmp/Cargo.toml

src/setjmp/build.rs

src/setjmp/cbindgen.toml

src/setjmp/src/impl/README.md

src/setjmp/src/impl/aarch64/longjmp.s

src/setjmp/src/impl/aarch64/setjmp.s

src/setjmp/src/impl/arm/longjmp.s

src/setjmp/src/impl/arm/setjmp.s

src/setjmp/src/impl/bin/.gitignore

src/setjmp/src/impl/i386/longjmp.s

src/setjmp/src/impl/i386/setjmp.s

src/setjmp/src/impl/m68k/longjmp.s

src/setjmp/src/impl/m68k/setjmp.s

src/setjmp/src/impl/microblaze/longjmp.s

src/setjmp/src/impl/microblaze/setjmp.s

src/setjmp/src/impl/mips/longjmp.S

src/setjmp/src/impl/mips/setjmp.S

src/setjmp/src/impl/mips64/longjmp.S