NCG: fast compilation of very large strings (#16190)
This patch adds an optimization into the NCG: for large strings
(threshold configurable via -fbinary-blob-threshold=N flag), instead
of printing .asciz "..."
in the generated ASM source, we print
.incbin "tmpXXX.dat"
and we dump the contents of the string into a
temporary "tmpXXX.dat" file.
See the note for more details.