Ported from https://sources.debian.org/src/freeradius/3.0.20+dfsg-3/debian/patches/dont-install-tests.diff/

See Also:
* https://bugzilla.redhat.com/show_bug.cgi?id=1146966#c2
--- a/src/tests/map/map_unit.mk
+++ b/src/tests/map/map_unit.mk
@@ -3,3 +3,4 @@
 
 TGT_PREREQS	:= libfreeradius-server.a libfreeradius-radius.a
 TGT_LDLIBS	:= $(LIBS)
+TGT_INSTALLDIR	:=
--- a/src/main/radattr.mk
+++ b/src/main/radattr.mk
@@ -8,3 +8,4 @@
 endif
 
 TGT_LDLIBS	:= $(LIBS)
+TGT_INSTALLDIR	:=