Re-enable TestMultithreaded.py test on Linux.

I could not get http://llvm.org/bugs/show_bug.cgi?id=16016)
to fail on my end running 10 times in a row.  Re-enabling
the test.


git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@202446 91177308-0d34-0410-b5e6-96231b3b80d8
Revert Xcode run argument settings that were accidentally checked in.



git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@202447 91177308-0d34-0410-b5e6-96231b3b80d8
Enable TestCallThatRestarts test on Linux.

This is related to:
http://llvm.org/bugs/show_bug.cgi?id=15278

I ran this 20 times in a row without failure at svn r202440 on Ubuntu
12.04 LTS x86_64 using July 2013 libedit and gcc 4.8.2.


git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@202448 91177308-0d34-0410-b5e6-96231b3b80d8
Re-enable TestExprDoesntBlock.py on Linux.

This is related to:
http://llvm.org/bugs/show_bug.cgi?id=15258

I ran this test 10 times successfully against Ubuntu 12.04 LTS x86_64
with lldb built with gcc 4.8.2 and July 2013 libedit.



git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@202456 91177308-0d34-0410-b5e6-96231b3b80d8