Disabled versioned installation of binaries to save space.
Also use symlinks where it's appropiate.

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
[Gustavo: update for 4.1.2]

diff -Nura gawk-4.1.2.orig/Makefile.in gawk-4.1.2/Makefile.in
--- gawk-4.1.2.orig/Makefile.in	2015-04-29 16:11:09.367925925 -0300
+++ gawk-4.1.2/Makefile.in	2015-04-29 16:11:25.308466495 -0300
@@ -554,7 +554,7 @@
 CLEANFILES = core core.*
 
 # We want hard links for install-exec-hook, below
-LN = ln
+LN = $(LN_S)
 
 # For some make's, e.g. OpenBSD, that don't define this
 RM = rm -f
@@ -1173,6 +1173,7 @@
 # (This is done universally, which may not always be right, but
 # there's no easy way to distinguish GNU from non-GNU systems.)
 install-exec-hook:
+foo:
 	(cd $(DESTDIR)$(bindir); \
 	$(LN) gawk$(EXEEXT) gawk-$(VERSION)$(EXEEXT) 2>/dev/null ; \
 	if [ ! -f awk$(EXEEXT) ]; \