test: add archer dynamic other frame test

Add archer dynamic other frame test temporarily.

testsuite/gdb.fortran/:

	* dynamic-other-frame-stub.f90: New file.
	* dynamic-other-frame.exp: New file.
	* dynamic-other-frame.f90: New file.

Change-Id: I2a7d6fc4db6f17df0b2dd471fd8a5d82f168e504