MIPS/GAS/testsuite: Correct swapped MIPS16e subset test names

MIPS/GAS/testsuite: Correct swapped MIPS16e subset test names

Correct the test names swapped between common and 64-bit MIPS16e subset
tests.

	gas/
	* testsuite/gas/mips/mips16e-sub.d: Correct test name.
	* testsuite/gas/mips/mips16-32@mips16e-sub.d: Likewise.
	* testsuite/gas/mips/mips16-64@mips16e-sub.d: Likewise.
	* testsuite/gas/mips/mips16e-64-sub.d: Likewise.
	* testsuite/gas/mips/mips16-32@mips16e-64-sub.d: Likewise.
	* testsuite/gas/mips/mips16-64@mips16e-64-sub.d: Likewise.
	* testsuite/gas/mips/mips16e-32@mips16e-64-sub.d: Likewise.