The gdb.base/linespecs.exp test should really live in the gdb.linespec
directory, so lets move it there.
As we already have gdb.linespec/linespec.exp, I've renamed the test to
gdb.linespec/errors.exp, as this better reflects what the test is
actually checking.
Finally, the test script doesn't have its own source file, it was
reusing a random other source file, gdb.base/memattr.c. Now the tests
script is in gdb.linespec/, I've updated the test to use a different
source file from that directory.
# We don't currently need our own test case for testing, so grab
# another one.
-if {[prepare_for_testing "failed to prepare" linespecs memattr.c]} {
+if {[prepare_for_testing "failed to prepare" linespecs keywords.c]} {
return -1
}