(Backend) Remove assertion affecting -H compiler option test

This is safe to do because it was never in the source code to
begin with, and the only reason it was able to make it in
without failure was because, at the time of integration, the
$ROSE/tests/CompilerOptionsTests were not being run as part of
Integration Testing.
(Build System) Add $(top_builddir)/tests/testTranslator dependency
(Build System) Use AM_SILENT_RULES([yes]) to reduce output spew

* Set "silent rules", i.e. `make V=0`, as default

* Output spew statistics:

  Command        Lines of Output        Size of Output
  -------        ---------------        --------------
  make V=1       6017                   15M
  make V=0       5027 (16.45% less)     584K (96.20% less)

* Remove use of $ROSE_DISTRIBUTION/scripts/quiet-mode in
  $ROSE/build since this prepends "@echo ..." to certain
  commands such as CXXCOMPILE, LTCXXCOMPILE, etc., which
  will then causes errors:

  ```bash
  $ make
  make[3]: Entering directory `${ROSE_BUILD}/src/util/stringSupport'
    CXX      string_functions.lo
  /bin/sh: @echo: command not found
    CXX      FileNameClassifier.lo
  /bin/sh: @echo: command not found
  ```

  This is due to the fact that the actual commandline
  will be expanded as something of this form:

  ```
  @@echo ...
  ```

* The Autoconf macro is invoked conditionally for backwards
  compatibility since it is only supported for Automake
  versions v1.11+.

  ```Autoconf
  m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
  ```

* Add banner at the end of $ROSE/build to indicate successful
  termination of the script.
Merge remote-tracking branch 'origin/master' into HEAD