add new SHF_* flags from binutils

Author: DerDakon

src/elf.h

@@ -366,7 +366,9 @@ typedef struct
 					   required */
 #define SHF_GROUP	     (1 << 9)	/* Section is member of a group.  */
 #define SHF_TLS		     (1 << 10)	/* Section hold thread-local data.  */
+#define SHF_COMPRESSED	     (1 << 11)	/* Section with compressed data */
 #define SHF_MASKOS	     0x0ff00000	/* OS-specific.  */
+#define SHF_GNU_BUILD_NOTE   (1 << 20)	/* Section contains GNU BUILD ATTRIBUTE notes.  */
 #define SHF_MASKPROC	     0xf0000000	/* Processor-specific */
 #define SHF_ORDERED	     (1 << 30)	/* Special ordering requirement
 					   (Solaris).  */