Updates to build rules and genVersionHeader.pl script

Added -q (quiet) flag, renamed INSTALL_QUIETLY build variable.
Moved GENVERSION variables into normal locations.
Changed from :: rule to : rule with FORCE dependency.
Removed use of --git-dir, only works when CWD is TOP.
Simplified some parts, more perlish.
Added VCS used to generated output file.
Expanded on the -v (verbose) output.

configure/CONFIG_COMMON

@@ -85,6 +85,7 @@ IOCS_APPL_TOP               = $(shell $(FULLPATHNAME) $(INSTALL_LOCATION))
 # Make echo output - suppress echoing if make's '-s' flag is set
 NOP = :
 ECHO = @$(if $(findstring s,$(patsubst T_A=%,,$(MAKEFLAGS))),$(NOP),echo)
+QUIET_FLAG := $(if $(findstring s,$(MAKEFLAGS)),-q,)
 
 #-------------------------------------------------------
 ifdef T_A
@@ -327,6 +328,14 @@ COMPILE.cpp = $(CCC) $(CPPFLAGS) $(CXXFLAGS) $(INCLUDES)
 # C preprocessor command
 PREPROCESS.cpp = $(CPP) $(CPPFLAGS) $(INCLUDES) $< > $@
 
+#--------------------------------------------------
+# genVersion header defaults
+
+# C macro name
+GENVERSIONMACRO = VCSVERSION
+# C macro default value (empty to use date+time)
+GENVERSIONDEFAULT =
+
 #--------------------------------------------------
 # Header dependency file generation