Do not update po files upon building and installing binaries.
Use a separate target instead.

Index: cpufrequtils/Makefile
===================================================================
--- cpufrequtils.orig/Makefile	2012-05-06 14:55:18.445553259 +0900
+++ cpufrequtils/Makefile	2012-05-06 14:55:26.589398186 +0900
@@ -211,9 +211,9 @@
 	test -f $(PACKAGE).po && \
 	mv -f $(PACKAGE).po po/$(PACKAGE).pot
 
-update-gmo: po/$(PACKAGE).pot
+update-po: po/$(PACKAGE).pot
 	 @for HLANG in $(LANGUAGES); do \
-		echo -n "Translating $$HLANG "; \
+		echo -n "Updating $$HLANG "; \
 		if msgmerge po/$$HLANG.po po/$(PACKAGE).pot -o \
 		   po/$$HLANG.new.po; then \
 			mv -f po/$$HLANG.new.po po/$$HLANG.po; \
@@ -221,6 +221,11 @@
 			echo "msgmerge for $$HLANG failed!"; \
 			rm -f po/$$HLANG.new.po; \
 		fi; \
+	done;
+
+update-gmo: po/$(PACKAGE).pot
+	 @for HLANG in $(LANGUAGES); do \
+		echo -n "Translating $$HLANG "; \
 		msgfmt --statistics -o po/$$HLANG.gmo po/$$HLANG.po; \
 	done;