lm32-linux ld testsuite fails

A number of the fails are due to ld supporting the creation of shared
libraries but not allowing linking against them without using an
option like -Bdynamic.
FAIL: Symbol export class test (final shared object)
FAIL: PROVIDE_HIDDEN test 4
FAIL: PROVIDE_HIDDEN test 6
FAIL: PROVIDE_HIDDEN test 10
FAIL: PROVIDE_HIDDEN test 12
FAIL: Build pr22471b.so
FAIL: Build pr22649-2b.so
FAIL: Build pr22649-2d.so
FAIL: PR ld/20828 dynamic symbols with section GC (plain)
FAIL: PR ld/20828 dynamic symbols with section GC (version script)
FAIL: PR ld/20828 dynamic symbols with section GC (versioned)
FAIL: PR ld/21233 dynamic symbols with section GC (--undefined)
FAIL: PR ld/21233 dynamic symbols with section GC (--require-defined)
FAIL: PR ld/21233 dynamic symbols with section GC (EXTERN)
FAIL: Build pr22150
FAIL: PR ld/14170
FAIL: Link using broken linker script
FAIL: pr17068 link --as-needed lib in group
FAIL: ld-gc/pr20022

	* emulparams/elf32lm32fd.sh (DYNAMIC_LINK): Undef.

Author: amodra

ld/ChangeLog

@@ -1,3 +1,7 @@
+2019-03-21  Alan Modra  <amodra@gmail.com>
+
+	* emulparams/elf32lm32fd.sh (DYNAMIC_LINK): Undef.
+
 2019-03-21  Alan Modra  <amodra@gmail.com>
 
 	* ldlang.c (lang_size_sections_1): Set SEC_KEEP on

ld/emulparams/elf32lm32fd.sh

@@ -1,5 +1,6 @@
 . ${srcdir}/emulparams/elf32lm32.sh
 unset STACK_ADDR
+unset DYNAMIC_LINK
 OUTPUT_FORMAT="elf32-lm32fdpic"
 MAXPAGESIZE="CONSTANT (MAXPAGESIZE)"
 TEMPLATE_NAME=elf32