Commit non bikeshed part of Differential Revision D582

makepatch target improvement:
- spurious ./ is removed from file names
- timestamps are normalized

Submitted by:	danfe
With hat:	portmgr

Mk/bsd.port.mk

@@ -1193,15 +1193,17 @@ STRIPBIN=	${STRIP_CMD}
 makepatch:
 	@${MKDIR} ${FILESDIR}
 	@(cd ${PATCH_WRKSRC}; \
-		for i in `find . -type f -name '*.orig'`; do \
-			ORG=$$i; \
-			NEW=$${i%.orig}; \
-			cmp -s $${ORG} $${NEW} && continue; \
-			OUT=${FILESDIR}`${ECHO} $${NEW} | \
-				${SED} -e 's|/|__|g' \
-					-e 's|^\.__|/patch-|'`; \
-			${ECHO} ${DIFF} -ud $${ORG} $${NEW} '>' $${OUT}; \
-			${DIFF} -ud $${ORG} $${NEW} > $${OUT} || ${TRUE}; \
+		for f in `${FIND} . -type f -name '*.orig'`; do \
+			ORIG=$${f#./}; \
+			NEW=$${ORIG%.orig}; \
+			cmp -s $${ORIG} $${NEW} && continue; \
+			PATCH=`${ECHO} $${NEW} | ${SED} -e 's|/|__|g'`; \
+			OUT=${FILESDIR}/patch-$${PATCH}; \
+			${ECHO} ${DIFF} -ud $${ORIG} $${NEW} '>' $${OUT}; \
+			TZ=UTC ${DIFF} -ud $${ORIG} $${NEW} | ${SED} -e \
+				'/^---/s|\.[0-9]* +0000$$| UTC|' -e \
+				'/^+++/s|\([[:blank:]][-0-9:.+]*\)*$$||' \
+					> $${OUT} || ${TRUE}; \
 		done \
 	)
 .endif