Add an insert() method to MapVector. Adds the first MapVector unit test.
FileCheck-ify some grep tests

These tests in particular try to use escaped square brackets as an
argument to grep, which is failing for me with native win32 python.  It
appears the backslash is being lost near the CreateProcess*() call.
Add parens to suppress an MSVC 2012 << precedence warning

It doesn't seem to like instantiating the isUInt<unsigned N> template
with 6+3, and then doing <<N.
Set the +x bit on two batch scripts

Cygwin git-svn will faithfully forward the svn properties all the way
down to the NTFS executable permission.  Without the +x bit, tests using
these scripts fail with "Access Denied".
XFAIL close-stderr on win32

The test runner does not rewrite instances of /dev/null inside the
quoted sh command.  /dev/null does not exist, so opt will fail to open
it, and return a non-zero exit code.
Temporarily disabling ms-asm test