Fix test names starting with uppercase using gdb_test_multiple

Fix test names starting with uppercase using gdb_test_multiple

This fixes offender testcases that have test names starting with uppercase
when using gdb_test_multiple in a single-line construct.

gdb/testsuite/ChangeLog
2016-12-01  Luis Machado  <lgustavo@codesourcery.com>

	Fix test names starting with uppercase throughout the files.

	* gdb.arch/i386-bp_permanent.exp
	* gdb.arch/i386-gnu-cfi.exp
	* gdb.base/disasm-end-cu.exp
	* gdb.base/macscp.exp
	* gdb.base/pending.exp
	* gdb.base/watch_thread_num.exp
	* gdb.cp/exception.exp
	* gdb.cp/gdb2495.exp
	* gdb.cp/local.exp
	* gdb.python/py-evsignal.exp
	* gdb.python/python.exp
	* gdb.trace/tracecmd.exp