Add elf_read_u8
diff --git a/ltrace-elf.c b/ltrace-elf.c
index aff585e..d9dac5e 100644
--- a/ltrace-elf.c
+++ b/ltrace-elf.c
@@ -237,6 +237,7 @@
 		return 0;						\
 	}
 
+DEF_READER(elf_read_u8, 8)
 DEF_READER(elf_read_u16, 16)
 DEF_READER(elf_read_u32, 32)
 DEF_READER(elf_read_u64, 64)