Update test_fail.phpt

Support the current HHVM error messages.
Update test_fail_multiple.phpt

Support HHVM error messages
Update test_fail.phpt

Support HHVM error messages
Update test_infoFromString_invalidxml.phpt

Support HHVM error messages
Update test_initialize_invalidpackagexml.phpt

Support HHVM error messages
Update test_fail.phpt

Support HHVM error messages
Update test_fail_multiple.phpt

Support HHVM error messages
Initialize htype to avoid undefined variable warning 

Since htype is not guaranteed to be set, HHVM gives a notice similar to: HipHop Notice: Undefined variable: htype in frameworks/pear-core/PEAR/Installer.php on line 657.
Move initialization of htype
Initialize htype to md5sum
Add sha1sum to xml expect

Now this test passes HHVM and Zend
Add sha1sum to XML

Now test passes both HHVM and Zend 5.5
Add sha1sum to expect xml

Now test passes both HHVM and Zend 5.5
Add sha1sum to expect XML

Now test passes both HHVM and Zend 5.5
Add sha1sum to expect XML

Now test passes both HHVM and Zend 5.5
Add support for HHVM

It uses older error messages
Fix variable name mistake when supporting HHVM
Fix case mistake when supporting HHVM
Add support for HHVM

HHVM has older-style error messages
Merge pull request #23 from JoelMarcey/master

Modify to help better support HHVM