comptools: do not force build of make-3.81 unless really needed

On systems with make-3.82, we forcibly force the build and the use
of make-3.81

But some newer tools break when building with make-3.81. For example,
eglibc-3.18 breaks.

Introduce a new blind options that tools may select if they require
make-3.81. If the system does not have make-3.81, and this option is
selected, then we force the build of make-3.81. Otherwise, we leave
it to the user to decide on his own.

Note that no component selects this option for now. It will come in
later patches as we find them.

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>

diff -dur ELFkickers.orig/sstrip/Makefile ELFkickers/sstrip/Makefile

--- ELFkickers.orig/sstrip/Makefile	2001-03-24 12:58:27.000000000 +0100

+++ ELFkickers/sstrip/Makefile	2007-05-31 21:17:18.000000000 +0200

@@ -1,7 +1,7 @@

 #  Makefile for sstrip

 sstrip: sstrip.c

-	gcc -ggdb -Wall -W -o sstrip sstrip.c

+	$(CC) -Wall -W -o sstrip sstrip.c

 clean:

 	rm -f sstrip