On case-insensitive systems, the 'install' target gets matched against

the 'INSTALL' file, which means that 9 times of 10, the BlowFish
headers won't get installed.  Avoid this in the same way it's done in
crypto/des/Makefile.ssl, where someone apparently has thought of this...

crypto/bf/Makefile.ssl

@@ -77,7 +77,9 @@ links:
 	@$(PERL) $(TOP)/util/mklink.pl ../../test $(TEST)
 	@$(PERL) $(TOP)/util/mklink.pl ../../apps $(APPS)
 
-install:
+install: installs
+
+installs:
 	@for i in $(EXHEADER) ; \
 	do  \
 	(cp $$i $(INSTALL_PREFIX)$(INSTALLTOP)/include/openssl/$$i; \