[LD][Testsuite] Add --no-dynamic-linker option to dynamic-1 rdynamic-1 test case.

[LD][Testsuite] Add --no-dynamic-linker option to dynamic-1 rdynamic-1 test case.

arm-none-eabi-ld supports shared libraries. However, the toolchain may be
configured to generate statically linked executable by default.

It is required to have --no-dynamic-linker option before adding dynamic symbol
to static executable.
For dynamically linked executable, the behavior won't change.

ld/ChangeLog
2017-06-13  Renlin Li  <renlin.li@arm.com>

	* testsuite/ld-elf/shared.exp (build_tests): Add --no-dynamic-linker
	option to rdynamic-1 and dynamic-1 tests.