add configure flag --build-verbose to enable verbose build

[mmitch]

• make V=0 can still override the setting from configure
• I was unsure what to call the new configure flag:
  • Because "verbose build" are two words, --enable-verbose-build and --with-verbose-build are to unwieldy IMHO.
  • --build-verbose does not fit with the other names, but the option itself does not really fit with the others as well
  • Or --verbose-build?

Suggestions welcome, changing the name is a simple replacement.

[codecov[bot]]

Codecov Report

Merging #49 (4540c99) into master (3ce190a) will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master      #49   +/-   ##
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  Coverage   44.54%   44.54%           
=======================================
  Files          19       19           
  Lines        2844     2844           
=======================================
  Hits         1267     1267           
  Misses       1577     1577           

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[ranma]

My preference would be --verbose-build or --enable-verbose-build.

[mmitch]

The configure script does not cope with the extra dash in --enable-verbose-build. I've used --enable-verbosebuild instead.

@ranma: if ok plz merge :-)

[mmitch]

added the new flag to the existing tests to ensure it works – no extra build matrix entries needed