make -j patch -- part 1 all targets [gcc/Makefile.in]

[DJ Delorie]

> So I moved the *_H definitions above the where the target/host
> overrides are included.

Make does not process definitions in order that way.  It doesn't
matter where they are in the Makefile relative to each other, so I
can't see how this patch fixes anything.

To demonstrate:

BAR = abc
FOO = $(BAR)
BAR = 123

all:
	echo $(FOO)