Switch to nonrecursive make for core (i.e. not tests/)

This is cleaner and faster, and prepares us better for an incoming
import of CMPH.

Makefile.am

@@ -1,73 +0,0 @@
-girepodir = $(includedir)/gobject-introspection-1.0/
-girepo_HEADERS =				\
-	giarginfo.h				\
-	gibaseinfo.h				\
-	gicallableinfo.h			\
-	giconstantinfo.h			\
-	gienuminfo.h				\
-	gierrordomaininfo.h			\
-	gifieldinfo.h				\
-	gifunctioninfo.h			\
-	giinterfaceinfo.h			\
-	giobjectinfo.h				\
-	gipropertyinfo.h			\
-	giregisteredtypeinfo.h			\
-	girepository.h				\
-	girffi.h				\
-	gisignalinfo.h				\
-	gistructinfo.h				\
-	gitypeinfo.h				\
-	gitypelib.h				\
-	gitypes.h				\
-	giunioninfo.h				\
-	givfuncinfo.h
-
-lib_LTLIBRARIES = libgirepository-1.0.la
-noinst_LTLIBRARIES = libgirepository-parser.la
-
-libgirepository_1_0_la_SOURCES =		\
-	gdump.c					\
-	giarginfo.c				\
-	gibaseinfo.c				\
-	gicallableinfo.c			\
-	giconstantinfo.c			\
-	gienuminfo.c				\
-	gierrordomaininfo.c			\
-	gifieldinfo.c				\
-	gifunctioninfo.c			\
-	ginvoke.c				\
-	giinterfaceinfo.c			\
-	giobjectinfo.c				\
-	gipropertyinfo.c			\
-	giregisteredtypeinfo.c			\
-	girepository.c				\
-	girepository-private.h			\
-	girffi.c                                \
-	girffi.h                                \
-	gisignalinfo.c				\
-	gistructinfo.c				\
-	gitypeinfo.c				\
-	gitypelib.c				\
-	gitypelib-internal.h			\
-	glib-compat.h				\
-	giunioninfo.c				\
-	givfuncinfo.c
-
-libgirepository_1_0_la_CPPFLAGS = $(GIREPO_CFLAGS) -DG_IREPOSITORY_COMPILATION
-libgirepository_1_0_la_LIBADD = $(GIREPO_LIBS)
-libgirepository_1_0_la_LDFLAGS = -no-undefined -version-number 1:0:0
-
-libgirepository_parser_la_SOURCES =		\
-	girmodule.c				\
-	girmodule.h				\
-	girnode.c				\
-	girnode.h				\
-	giroffsets.c				\
-	girparser.c				\
-	girparser.h				\
-	girwriter.c				\
-	girwriter.h
-libgirepository_parser_la_CFLAGS = $(GIREPO_CFLAGS)
-
-gdumpdir = $(datadir)/gobject-introspection-1.0/
-gdump_DATA = gdump.c