* config/mips/tm-irix5.h (IN_SIGTRAMP): Redefine for Irix 5,

	* config/mips/tm-irix5.h (IN_SIGTRAMP):  Redefine for Irix 5,
	Irix 5 has a standard _sigtramp signal handler.
	* irix5-nat.c (solib_add):  Get rid of sigtramp_address handling,
	it is not needed for a standard _sigtramp signal handler.
	Add shared library sections to the section table of the target
	before adding the symbols.
	* mips-tdep.c (mips_skip_prologue):  Do not skip load immediate
	instructions that do not prepare a stack adjustment.
	* regex.c (SIGN_EXTEND_CHAR):  Update to emacs-19.25 definition,
	which does the right thing on machines where `char' is unsigned.