Use make SILENT=0 by default

Silent build configs are good for the core developers of a project
because they understand the build config, however it's an obstacle
for newcomers who'll be better served by seeing the build commands

build/definitions.mk

@@ -49,7 +49,7 @@ SED ?= /bin/sed
 MKDIR ?= /bin/mkdir -p
 TAGS ?= /usr/bin/ctags  # emacs source builds or something breaks it
 ARFLAGS = rcsD
-SILENT ?= 1
+SILENT ?= 0
 ZFLAGS ?=
 XARGS ?= xargs -P4 -rs8000
 NICE ?= build/actuallynice