8065138: Encodings.isRecognizedEnconding sometimes fails to recognize 'UTF8'

Reviewed-by: dfuchs

make/common/JavaCompilation.gmk

@@ -400,13 +400,15 @@ define add_file_to_clean
   # Now we can setup the depency that will trigger the copying.
   $$($1_BIN)$$($2_TARGET) : $2
 	$(MKDIR) -p $$(@D)
-	$(CAT) $$< | $(SED) -e 's/\([^\\]\):/\1\\:/g' -e 's/\([^\\]\)=/\1\\=/g' \
+	export LC_ALL=C ; $(CAT) $$< \
+	    | $(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" \
 	    | $(SED) -e '/^#/d' -e '/^$$$$/d' \
 	        -e :a -e '/\\$$$$/N; s/\\\n//; ta' \
 	        -e 's/^[ 	]*//;s/[ 	]*$$$$//' \
-	        -e 's/\\=/=/' | LC_ALL=C $(SORT) > $$@
+	        -e 's/\\=/=/' \
+	    | $(SORT) > $$@
 	$(CHMOD) -f ug+w $$@
 
   # And do not forget this target