When libtool links a library with another libtool-based library, it
replaces -lfoo by path to installed foo, like $foo-libdir/libfoo.la.
harfbuzz would be installed to /usr/local/lib by default, therefore
libtool replaces -lharfbuzz by /usr/local/lib/libharfbuzz.la in
libfreetype.la, which causes a failure (nonexistent file) when building
fontconfig...

Change-Id: Ie2510034e69803af084dd90671fdbc8f6863fcf2