Fix a bug in Infiniband plugin; make code cleaner

git-svn-id: svn://svn.code.sf.net/p/dmtcp/code/trunk@2175 ba6dc0ae-232f-0410-883f-9ebac64fc565
Update Makefile of Infiniband plugin

git-svn-id: svn://svn.code.sf.net/p/dmtcp/code/trunk@2176 ba6dc0ae-232f-0410-883f-9ebac64fc565
remove some debug information

git-svn-id: svn://svn.code.sf.net/p/dmtcp/code/trunk@2177 ba6dc0ae-232f-0410-883f-9ebac64fc565
Make dmtcp_event_hook a weak symbol.

git-svn-id: svn://svn.code.sf.net/p/dmtcp/code/trunk@2178 ba6dc0ae-232f-0410-883f-9ebac64fc565
Added -Bsymbolic-function linker option.

git-svn-id: svn://svn.code.sf.net/p/dmtcp/code/trunk@2179 ba6dc0ae-232f-0410-883f-9ebac64fc565
Fix for conditional compilation of ptrace plugin.

git-svn-id: svn://svn.code.sf.net/p/dmtcp/code/trunk@2180 ba6dc0ae-232f-0410-883f-9ebac64fc565
Fix distclean target for test/Makefile.

git-svn-id: svn://svn.code.sf.net/p/dmtcp/code/trunk@2181 ba6dc0ae-232f-0410-883f-9ebac64fc565