DT_FLAGS_1: Add Solaris bits

The following bits in DT_FLAGS_1 are used by Solaris:

 #define DF_1_KMOD       0x10000000 /* kernel module */
 #define DF_1_WEAKFILTER 0x20000000 /* apply weak binding to DT_FILTER */
 #define DF_1_NOCOMMON   0x40000000 /* no COMMON symbols exist */

binutils/

	* readelf.c (process_dynamic_section): Also dump DF_1_KMOD,
	DF_1_WEAKFILTER and DF_1_NOCOMMON.

include/

	* elf/common.h (DF_1_KMOD): New.
	(DF_1_WEAKFILTER): Likewise.
	(DF_1_NOCOMMON): Likewise.