Fix dlmalloc Makefile to get the dependences correct for multiple compiler builds.
Fix dlmalloc Makefile to get the dependences correct for multiple compiler builds.

The install dir used to check for dependences was only unique to the
platform, and not the compiler, so multiple builds using different
compilers would fail to rebuild dlmalloc.

Arg.  This is a situation we never test *until we build the release*.




git-svn-id: 88467cb1fb04b8a755be7e1ee1026be4190196ef@19964 3a8e244f-b0f2-452b-bcba-4c88e055c3ca

CoryMcCartan/chapel,chizarlicious/chapel,CoryMcCartan/chapel,hildeth/chapel,chizarlicious/chapel,CoryMcCartan/chapel,sungeunchoi/chapel,chizarlicious/chapel,CoryMcCartan/chapel,hildeth/chapel,sungeunchoi/chapel,sungeunchoi/chapel,chizarlicious/chapel,sungeunchoi/chapel,sungeunchoi/chapel,hildeth/chapel,hildeth/chapel,hildeth/chapel,hildeth/chapel,sungeunchoi/chapel,chizarlicious/chapel,CoryMcCartan/chapel,sungeunchoi/chapel,hildeth/chapel,CoryMcCartan/chapel,CoryMcCartan/chapel,chizarlicious/chapel,sungeunchoi/chapel,chizarlicious/chapel