8.0-BETA3: make WITHOUT_INSTALLLIB=yes buildworld broken

[Eugene Grosbein]

Hi!

WITHOUT_INSTALLLIB= knob is documented in src.conf(5)
as feature useful for nanobsb build to skip *.a libraries.

In 8.0-BETA3, make buildworld breaks in 3 seconds after start
when this knob is used:

cc -O2 -pipe -DNEED_SOLARIS_BOOLEAN
-I/usr/local/src/cddl/usr.bin/sgsmsg/../../../sys/cddl/compat/opensolaris
-I/usr/local/src/cddl/usr.bin/sgsmsg/../../../cddl/compat/opensolaris/include
-I/usr/local/src/cddl/usr.bin/sgsmsg/../../../cddl/contrib/opensolaris/cmd/sgs/include
-I/usr/local/src/cddl/usr.bin/sgsmsg/../../../sys/cddl/contrib/opensolaris/uts/common
-DNEED_SOLARIS_BOOLEAN  -Wno-unknown-pragmas
-I/usr/obj/usr/local/src/tmp/legacy/usr/include -c
/usr/local/src/cddl/usr.bin/sgsmsg/../../../cddl/contrib/opensolaris/cmd/sgs/tools/common/findprime.c
make: don't know how to make
/usr/obj/usr/local/src/tmp/legacy/usr/lib/libegacy.a. Stop
*** Error code 2

Stop in /usr/local/src.
*** Error code 1

Stop in /usr/local/src.
*** Error code 1

Stop in /usr/local/src.