elf: Define Go Build ID constants

src/elf.rs

@@ -1835,6 +1835,10 @@ pub const NT_SOLARIS_PAGESIZE_HINT: u32 = 1;
 /// GNU entries in the note section have this name.
 pub const ELF_NOTE_GNU: &[u8] = b"GNU";
 
+/// Go entries in the note section have this name.
+// See https://go-review.googlesource.com/9520 and https://go-review.googlesource.com/10704.
+pub const ELF_NOTE_GO: &[u8] = b"Go";
+
 // Note types for `ELF_NOTE_GNU`.
 
 /// ABI information.
@@ -1870,6 +1874,12 @@ pub const NT_GNU_HWCAP: u32 = 2;
 /// The descriptor consists of any nonzero number of bytes.
 pub const NT_GNU_BUILD_ID: u32 = 3;
 
+/// Build ID bits as generated by Go's gc compiler.
+///
+/// The descriptor consists of any nonzero number of bytes.
+// See https://go-review.googlesource.com/10707.
+pub const NT_GO_BUILD_ID: u32 = 4;
+
 /// Version note generated by GNU gold containing a version string.
 pub const NT_GNU_GOLD_VERSION: u32 = 4;