Update the tcmalloc vendor branch to r144 (gperftools 2.0).

third_party/tcmalloc/vendor/packages/rpm.sh

 #!/bin/sh -e
 
 # Run this from the 'packages' directory, just under rootdir
 
 # We can only build rpm packages, if the rpm build tools are installed
 if [ \! -x /usr/bin/rpmbuild ]
 then
   echo "Cannot find /usr/bin/rpmbuild. Not building an rpm." 1>&2
   exit 0
 fi
@@ skipping 34 matching lines @@
 mkdir "$RPM_SOURCE_DIR"
 mkdir "$RPM_BUILD_DIR"
 
 cp "$archive" "$RPM_SOURCE_DIR"
 
 # rpmbuild -- as far as I can tell -- asks the OS what CPU it has.
 # This may differ from what kind of binaries gcc produces.  dpkg
 # does a better job of this, so if we can run 'dpkg --print-architecture'
 # to get the build CPU, we use that in preference of the rpmbuild
 # default.
-target=`dpkg --print-architecture 2>/dev/null`   # "" if dpkg isn't found
+target=`dpkg --print-architecture 2>/dev/null || echo ""`
 if [ -n "$target" ]
 then
    target=" --target $target"
 fi
 
 rpmbuild -bb rpm/rpm.spec $target \
   --define "NAME $PACKAGE" \
   --define "VERSION $VERSION" \
   --define "_sourcedir $RPM_SOURCE_DIR" \
   --define "_builddir $RPM_BUILD_DIR" \
@@ skipping 11 matching lines @@
    grep "Fedora Core.*release 3" /etc/issue >/dev/null 2>&1 && destdir=fc3
 fi
 
 rm -rf "$destdir"
 mkdir -p "$destdir"
 # We want to get not only the main package but devel etc, hence the middle *
 mv "$RPM_SOURCE_DIR"/*/"${PACKAGE}"-*"${VERSION}"*.rpm "$destdir"
 
 echo
 echo "The rpm package file(s) are located in $PWD/$destdir"