$(v)echo foo -> $v echo foo for verbosity modifier

Not sure why I crammed $(v) up like that with the parens. This is
a little sed job after regretting the Makefile seeming harder to read.
Certainly better.

We want clang or gcc picked for both C++/C

Few final cleanups - time to feed it to Travis.

configure.ac

@@ -88,15 +88,16 @@ fi
 # Do CC also, because PCRE2 will use it. Prefer clang++,
 # targets like FreeBSD ship an ancient one.
 AC_PROG_CC([clang llvm-gcc gcc cc])
+AC_PROG_CC_STDC # c99
 AC_PROG_CXX([clang++ llvm-g++ g++ c++])
 AC_PROG_CXXCPP([clang++ llvm-g++ g++ c++])
+AC_LANG(C++)
 AC_PROG_INSTALL
 AC_PROG_LN_S
 AC_PROG_MKDIR_P
 AC_PROG_AWK
 AC_PROG_FGREP
 AC_PROG_SED
-AC_LANG(C++)
 AC_USE_SYSTEM_EXTENSIONS
 
 #