Bit the bullet and set it on all files. It's too much of a pain
trying to avoid history changes on 20-or-so files each time I have to set
this property.
svn path=/trunk/mcs/; revision=41887
* *.cs: fix some incorrect tests by either addding a Main method,
or adding a -t:library compiler option. Makes one test pass, and adds
19 to *-expect-wrong-error as they compile when they shouldn't
* *mcs-expect-*-error: update
svn path=/trunk/mcs/; revision=34599
