mscoree: COM cleanup for the ICLRRuntimeInfo iface.

[Dan Kegel]

Seems to cause a test failure here?

make[1]: Entering directory
`/home/dank/wineslave.dir/sandbox/slave/runtests/build/dlls/mscoree/tests'
../../../tools/runtest -q -P wine -M mscoree.dll -T ../../.. -p
mscoree_test.exe.so metahost.c && touch metahost.ok
metahost.c:135: Test failed: got unexpected version L"v1.1.4322"
fixme:mscoree:CLRMetaHost_GetRuntime Unrecognized version L"v2.0.0"
Command exited with non-zero status 1
0.04user 0.03system 0:00.09elapsed 82%CPU (0avgtext+0avgdata 27104maxresident)k
0inputs+0outputs (0major+5905minor)pagefaults 0swaps
make[1]: *** [metahost.ok] Error 1
../../../tools/runtest -q -P wine -M mscoree.dll -T ../../.. -p
mscoree_test.exe.so mscoree.c && touch mscoree.ok
mscoree.c:140: Test failed: version is L"v1.1.4322" , expected L"v2.0.50727"
mscoree.c:145: Test failed: version is L"v1.1.4322" , expected L"v2.0.50727"
fixme:mscoree:CreateConfigStream ((null), 0x32fbb4): stub
fixme:mscoree:CreateConfigStream
(L"Z:\\home\\dank\\wineslave.dir\\sandbox\\slave\\runtests\\build\\dlls\\mscoree\\tests\\conf.xml",
(nil)): stub
fixme:mscoree:CreateConfigStream ((null), (nil)): stub
fixme:mscoree:CreateConfigStream (L"nonexist.xml", 0x32fbb4): stub
fixme:mscoree:CreateConfigStream
(L"Z:\\home\\dank\\wineslave.dir\\sandbox\\slave\\runtests\\build\\dlls\\mscoree\\tests\\conf.xml",
0x32fbb4): stub
Command exited with non-zero status 2
0.05user 0.02system 0:00.09elapsed 81%CPU (0avgtext+0avgdata 27296maxresident)k
0inputs+8outputs (0major+5969minor)pagefaults 0swaps
make[1]: *** [mscoree.ok] Error 2
make[1]: Target `test' not remade because of errors.

(Log at http://buildbot.kegel.com:8010/builders/runtests/builds/32 for
a day or so.)