build: rhel3 linker script fails

[derekbruening]

From derek.br...@gmail.com on March 03, 2009 18:45:59

after fixing issue #18 with issue #19 we still hit issues on RHEL3:
RHEL3 linker script has no __executable_start: I tried to add it
but not working: gives errors about __executable_start symbol

Original issue: http://code.google.com/p/dynamorio/issues/detail?id=72