Accept mips-sgi-irix output in a few ld tests

mips-sgi-irix gas emits STT_OBJECT symbols where other assemblers
would use STT_NOTYPE.  See mips_frob_symbol in gas/config/tc-mips.c.
Also, the section of some dynamic symbols is set to SHN_MIPS_TEXT or
SHN_MIPS_DATA.  See _bfd_mips_elf_finish_dynamic_symbol in
bfd/elfxx-mips.c.  These differences are visible in readelf output
and cause some tests to fail for no other good reason.

The patch fixes the following fails and removes an xfail.
FAIL: ld-elf/pr23591
FAIL: PROVIDE_HIDDEN test (auxiliary shared object)
FAIL: PR ld/21233 dynamic symbols with section GC (auxiliary shared library)

	* testsuite/ld-elf/pr21233-l.sd: Accept OBJECT for type and
	PRC for section of symbols.
	* testsuite/ld-elf/pr23591.d: Likewise.
	* testsuite/ld-elf/provide-hidden-s.nd: Likewise.
	* testsuite/ld-mips-elf/start.s: Make symbols function type.
	* testsuite/ld-mips-elf/hash2.d: Adjust.  Don't xfail irix.

ld/ChangeLog

@@ -1,3 +1,12 @@
+2019-12-17  Alan Modra  <amodra@gmail.com>
+
+	* testsuite/ld-elf/pr21233-l.sd: Accept OBJECT for type and
+	PRC for section of symbols.
+	* testsuite/ld-elf/pr23591.d: Likewise.
+	* testsuite/ld-elf/provide-hidden-s.nd: Likewise.
+	* testsuite/ld-mips-elf/start.s: Make symbols function type.
+	* testsuite/ld-mips-elf/hash2.d: Adjust.  Don't xfail irix.
+
 2019-12-17  Alan Modra  <amodra@gmail.com>
 
 	* emulparams/tic80coff.sh: Delete file.

ld/testsuite/ld-elf/pr21233-l.sd

@@ -2,5 +2,5 @@
 #    Num:    Value  Size Type    Bind   Vis      Ndx Name
 #      1: 00000000     1 OBJECT  GLOBAL DEFAULT    5 bar
 #...
- *[0-9]+: +[0-9a-f]+ +1 +OBJECT +GLOBAL +DEFAULT +[0-9]+ +bar
+ *[0-9]+: +[0-9a-f]+ +1 +OBJECT +GLOBAL +DEFAULT +([0-9]+|PRC\[0xff02\]) +bar
 #pass

ld/testsuite/ld-elf/pr23591.d

@@ -8,5 +8,5 @@
 # relocations in read-only sections.
 
 #...
- +[0-9]+: +[a-f0-9]+ +0 +NOTYPE +(GLOBAL +HIDDEN|LOCAL +DEFAULT) +[0-9]+ +___?start___sancov_cntrs
+ +[0-9]+: +[a-f0-9]+ +0 +(NOTYPE|OBJECT) +(GLOBAL +HIDDEN|LOCAL +DEFAULT) +[0-9]+ +___?start___sancov_cntrs
 #pass

ld/testsuite/ld-elf/provide-hidden-s.nd

@@ -1,8 +1,8 @@
 Symbol table '\.dynsym' contains [0-9]+ entries:
 #...
- *[0-9]+: 0*12300000 +0 (?:NOTYPE|OBJECT) +GLOBAL +DEFAULT +[0-9]+ foo
+ *[0-9]+: 0*12300000 +0 (?:NOTYPE|OBJECT) +GLOBAL +DEFAULT +([0-9]+|PRC\[0xff02\]) foo
 #...
 Symbol table '\.symtab' contains [0-9]+ entries:
 #...
- *[0-9]+: 0*12300000 +0 (?:NOTYPE|OBJECT) +GLOBAL +DEFAULT +[0-9]+ foo
+ *[0-9]+: 0*12300000 +0 (?:NOTYPE|OBJECT) +GLOBAL +DEFAULT +([0-9]+|PRC\[0xff02\]) foo
 #pass

ld/testsuite/ld-mips-elf/hash2.d

@@ -2,16 +2,15 @@
 #readelf: -d -s -D
 #ld: -shared --hash-style=gnu
 #target: [check_shared_lib_support] 
-#xfail: mips*-*-irix*
 
 #...
  +0x[0-9a-z]+ +\(MIPS_XHASH\) +0x[0-9a-z]+
 #...
- +[0-9]+ +[0-9]+: +[0-9a-f]+ +[0-9]+ +NOTYPE +GLOBAL +DEFAULT +[1-9] _start
+ +[0-9]+ +[0-9]+: +[0-9a-f]+ +[0-9]+ +FUNC +GLOBAL +DEFAULT +([1-9]|PRC) _start
 #...
- +[0-9]+ +[0-9]+: +[0-9a-f]+ +[0-9]+ +NOTYPE +GLOBAL +DEFAULT +[1-9] main
+ +[0-9]+ +[0-9]+: +[0-9a-f]+ +[0-9]+ +FUNC +GLOBAL +DEFAULT +([1-9]|PRC) main
 #...
- +[0-9]+ +[0-9]+: +[0-9a-f]+ +[0-9]+ +NOTYPE +GLOBAL +DEFAULT +[1-9] start
+ +[0-9]+ +[0-9]+: +[0-9a-f]+ +[0-9]+ +FUNC +GLOBAL +DEFAULT +([1-9]|PRC) start
 #...
- +[0-9]+ +[0-9]+: +[0-9a-f]+ +[0-9]+ +NOTYPE +GLOBAL +DEFAULT +[1-9] __start
+ +[0-9]+ +[0-9]+: +[0-9a-f]+ +[0-9]+ +FUNC +GLOBAL +DEFAULT +([1-9]|PRC) __start
 #...

ld/testsuite/ld-mips-elf/start.s

@@ -1,12 +1,17 @@
 	.text
-	.globl start
+	.globl	start
+	.type	start, @function
 start:
-	.globl _start
+	.globl	_start
+	.type	_start, @function
 _start:
-	.globl __start
+	.globl	__start
+	.type	__start, @function
 __start:
-	.globl main
+	.globl	main
+	.type	main, @function
 main:
 	.globl	_main
+	.type	_main, @function
 _main:
 	.dc.a 0