COPY -> INSTALL_COPY and STRIP -> INSTALL_STRIP

This fixes namespace problems where STRIP is sometimes used as
the name of the strip(1) to use and other times used as
the flag to send install(1) when stripping (or not).
COPY doesn't have this problem (yet) but was poorly named.

src/include/Makefile

@@ -1,4 +1,4 @@
-#	$OpenBSD: Makefile,v 1.39 1997/04/19 21:26:15 millert Exp $
+#	$OpenBSD: Makefile,v 1.40 1997/04/27 20:55:58 millert Exp $
 #	$NetBSD: Makefile,v 1.59 1996/05/15 21:36:43 jtc Exp $
 
 #	@(#)Makefile	5.45.1.1 (Berkeley) 5/6/91
@@ -52,7 +52,7 @@ includes:
 	@echo installing ${FILES}
 	@-for i in ${FILES}; do \
 		cmp -s $$i ${DESTDIR}/usr/include/$$i || \
-		    ${INSTALL} ${COPY} -m 444 $$i ${DESTDIR}/usr/include/$$i; \
+		    ${INSTALL} ${INSTALL_COPY} -m 444 $$i ${DESTDIR}/usr/include/$$i; \
 	done
 	@echo installing ${DIRS}
 	@-for i in ${DIRS}; do \
@@ -60,7 +60,7 @@ includes:
 			${DESTDIR}/usr/include/$$i; \
 		(cd $$i; for j in *.[ih]; do \
 			cmp -s $$j ${DESTDIR}/usr/include/$$i/$$j || \
-			${INSTALL} ${COPY} -m 444 $$j ${DESTDIR}/usr/include/$$i/$$j; \
+			${INSTALL} ${INSTALL_COPY} -m 444 $$j ${DESTDIR}/usr/include/$$i/$$j; \
 		done); \
 	done
 	@echo installing ${LFILES}

src/lib/libutil/Makefile

@@ -1,4 +1,4 @@
-#	$OpenBSD: Makefile,v 1.12 1997/02/16 19:59:17 provos Exp $
+#	$OpenBSD: Makefile,v 1.13 1997/04/27 20:56:18 millert Exp $
 #	$NetBSD: Makefile,v 1.8 1996/05/16 07:03:28 thorpej Exp $
 
 LIB=	util
@@ -38,7 +38,7 @@ MLINKS+=scsi.3 scsi_debug_output.3
 includes:
 	@cd ${.CURDIR}; for i in $(HDRS); do \
 	    j="cmp -s $$i ${DESTDIR}/usr/include/$$i || \
-		${INSTALL} ${COPY} -o ${BINOWN} -g ${BINGRP} -m 444 $$i \
+		${INSTALL} ${INSTALL_COPY} -o ${BINOWN} -g ${BINGRP} -m 444 $$i \
 		${DESTDIR}/usr/include"; \
 	    echo $$j; \
 	    eval "$$j"; \