eeshow/main.c (verbose): move to new file diag.c

In preparation of a more flexible diagnostics system.

eeshow/Makefile

@@ -14,7 +14,7 @@ NAME = eeshow
 OBJS = main.o sch-parse.o sch-render.o lib-parse.o lib-render.o \
        gui.o gui-over.o gui-style.o gui-aoi.o fmt-pango.o \
        file.o git-util.o git-file.o git-hist.o delta.o \
-       style.o fig.o record.o cro.o diff.o gfx.o dwg.o text.o misc.o
+       style.o fig.o record.o cro.o diff.o gfx.o dwg.o text.o misc.o diag.o
 
 CFLAGS = -g  -Wall -Wextra -Wno-unused-parameter -Wshadow \
 	 -Wmissing-prototypes -Wmissing-declarations \