Add a "make report" phony target

This builds everything, runs the test suites, and then diffs against the
whitelists to make sure there aren't any new failures.

Makefile.in

@@ -59,6 +59,24 @@ all: @default_target@
 newlib: stamps/build-gcc-newlib-stage2
 linux: stamps/build-gcc-linux-stage2
 
+.PHONY: build-binutils build-gcc1 build-libc build-gcc2 build-qemu
+build-binutils: stamps/build-binutils-@default_target@
+build-gcc%: stamps/build-gcc-@default_target@-stage%
+ifeq (@default_target@,linux)
+build-libc: $(patsubst %,stamps/build-glibc-linux-%,$(MULTLIB_NAMES))
+else
+build-libc: build-newlib
+endif
+build-qemu: stamps/build-qemu
+
+.PHONY: check check-gcc
+check: check-gcc
+check-gcc: stamps/check-gcc-@default_target@
+
+.PHONY: report report-gcc
+report: report-gcc
+report-gcc: report-gcc-@default_target@
+
 $(addprefix src/original-,$(PACKAGES)):
 	mkdir -p src
 	rm -rf $@ $(subst original-,,$@)-*