MIPS/LD/testsuite: Fix lazy binding stub test symbol count comment

MIPS/LD/testsuite: Fix lazy binding stub test symbol count comment

Update the symbol count in the comment associated with lazy binding stub
tests to match `base_syms', complementing commit 889acb80acd5
("MIPS/Linux/LD/testsuite: Linker script _gp scope updates"),
<https://sourceware.org/ml/binutils/2012-08/msg00066.html>, and commit
2f9efdfcdbf1 ("mips/bfd/ld: Fix --as-needed on mips and update related
ld tests"), <https://sourceware.org/ml/binutils/2013-09/msg00131.html>.

	ld/
	* testsuite/ld-mips-elf/mips-elf.exp: Update symbol count in the
	comment associated with lazy binding stub tests.