8072950: api/xinclude/Harold/harold-97.html\#harold-97, api/xinclude/Harold/harold-67.html\#harold-67 fails on solaris with build port-stage-aarch64

Reviewed-by: tbell

make/common/JavaCompilation.gmk

@@ -362,6 +362,10 @@ endef
 # This is the new clean standard. Though it is to be superseded by
 # a standard annotation processor from with sjavac.
 #
+# An empty echo ensures that the input to sed always ends with a newline.
+# Certain implementations (e.g. Solaris) will skip the last line without
+# it.
+#
 # The sed expression does this:
 # 1. Add a backslash before any :, = or ! that do not have a backslash already.
 # 2. Apply the file unicode2x.sed which does a whole bunch of \u00XX to \xXX
@@ -384,7 +388,7 @@ define add_file_to_clean
   # Now we can setup the depency that will trigger the copying.
   $$($1_BIN)$$($2_TARGET) : $2
 	$(MKDIR) -p $$(@D)
-	export LC_ALL=C ; $(CAT) $$< \
+	export LC_ALL=C ; ( $(CAT) $$< && $(ECHO) "" ) \
 	    | $(SED) -e 's/\([^\\]\):/\1\\:/g' -e 's/\([^\\]\)=/\1\\=/g' \
 	        -e 's/\([^\\]\)!/\1\\!/g' -e 's/#.*/#/g' \
 	    | $(SED) -f "$(SRC_ROOT)/make/common/support/unicode2x.sed" \