Add missing EM_RISCV constant

AMS21 · tgross35 · commit 3342d401eaf2 · 2025-09-22T01:50:25.000Z
(backport <#4659>) (cherry picked from commit 3f2a3ab)
diff --git a/libc-test/semver/linux.txt b/libc-test/semver/linux.txt
@@ -514,6 +514,7 @@ EM_PPC64
 EM_PRISM
 EM_RCE
 EM_RH32
+EM_RISCV
 EM_S370
 EM_S390
 EM_SH
diff --git a/src/unix/linux_like/linux/mod.rs b/src/unix/linux_like/linux/mod.rs
@@ -2482,6 +2482,7 @@ pub const EM_XTENSA: u16 = 94;
 pub const EM_AARCH64: u16 = 183;
 pub const EM_TILEPRO: u16 = 188;
 pub const EM_TILEGX: u16 = 191;
+pub const EM_RISCV: u16 = 243;
 pub const EM_ALPHA: u16 = 0x9026;
 
 // elf.h - Legal values for e_version (version).
