make -C does not update the PWD var. addresses #277

git-svn-id: file:///svn/tokudb@1734 c7de825b-a66e-492c-adef-691d508d4ae1

Makefile

@@ -4,10 +4,10 @@ TAGS: */*.c */*.h
 SRCDIRS = newbrt src src/tests cxx cxx/tests utils db-benchmark-test db-benchmark-test-cxx
 
 clean:
-	for d in $(SRCDIRS); do $(MAKE) -k -C $$d clean; done
+	for d in $(SRCDIRS); do (cd $$d; $(MAKE) -k clean); done
 
 build:
-	for d in $(SRCDIRS); do $(MAKE) -k -C $$d; done
+	for d in $(SRCDIRS); do (cd $$d; $(MAKE) -k); done
 
 build-coverage:
-	for d in $(SRCDIRS); do $(MAKE) -k -C $$d -k OPTFLAGS="-O0" GCOV_FLAGS="-fprofile-arcs -ftest-coverage"; done
+	for d in $(SRCDIRS); do (cd $$d; $(MAKE) -k -k OPTFLAGS="-O0" GCOV_FLAGS="-fprofile-arcs -ftest-coverage"); done