Add initial standard_test.go based on $GOPATH/test/run.go. For #48
cmd/llgo-build: Return error if linkdeps fail
llgo/llgo.go: Return an error if no files managed to parse

Otherwise it panics later trying to access the 0th element in a nil
array.
Merge branch 'master' of https://github.com/axw/llgo
llgo/utils_test.go: More detailed error messages if any step fails

Let's us know more details on exactly why and where a test failed.
check.go: Accumulate typecheck error messages.

Standard gc enables this via "-e" which might be good to implement
for llgo too.
pkg/runtime/lock_unimplemented.go: Use method name in panic message
cmd/llg-dist: Build more standard packages
llgo/standard_test.go: partial fix of errorcheck. Fixed runoutput
pkg/*: Added a couple of dummy .ll files
Merge pull request #58 from quarnster/master

standard_test.go + fixes here and there uncovered by running these tests