unbreak build with llvm-19+ by pulling the following upstream commits
5a9c052ba78e5d1b0020b8f8320d211d2205a958 amd: Include missing llvm IR header Module.h
fa9cd89a85b904615ebc11da609445b5b751e68d Update lp_bld_misc.cpp to support llvm-19+.
a8eed9cca26b1c4b6526be7d042adec6703a30ae gallium: Don't pass avx512er and avx512pf features on LLVM 19
ok jsg@
xenocara xlock uses imsg for privsep.
What changes:
- imsg_init becomes imsgbuf_init but imsgbuf_init can now fail
- Adding imsgbuf functions to hide the msgbuf functions:
msgbuf_clear -> imsgbuf_clear
msgbuf_write -> imsgbuf_write
- Also rename imsg_read to imsgbuf_read.
- Both imsgbuf_read and imsgbuf_write have simplified error handling.
imsgbuf_write now returns 0 on success so that old wrong connection
closed check must be removed
- Remove now official ibuf_get_string()
OK tb@ matthieu@