Removing PHX from VaultSimC causes build failure

[pdbj]

New Issue for sst-elements

1. Detailed description of problem or enhancement This commit removing PHX from VaultSimC causes a configure failure, which only shows up at build time.

2. Describe how to reproduce a. Configure and build with anything before PHX was removed b. Now advance to after PHX was removed c. Configure and build:

   $ ./configure
   ...
   [completes without error]
   $ make 
   CDPATH="${ZSH_VERSION+.}:" && cd . && /bin/sh /g/g17/barnes/Code/SST/sst-elements/config/missing aclocal-1.13 -I config
   aclocal-1.13: error: config/sst_elements_include.m4:11: file 'src/sst/elements/VaultSimC/configure.m4' does not exist
   make: *** [aclocal.m4] Error 1
   

The failure is caused by the deletion of VaultSimC/configure.m4 in the commit, and the fact that it is still mentioned in the generated file config/sst_elements_include.m4

3. How to fix Run ./autogen.sh first, before ./configure

4. What should happen The build system should figure out that ./autogen.sh is needed and run it as part of ./configure