most recent changes, diff for libexif

Index: graphics/libexif/Portfile
--- graphics/libexif/Portfile (revision 29246)
+++ graphics/libexif/Portfile (revision 29247)
@@ -24,6 +24,7 @@
sha1 4fea28a05496b3c7075ca5f619439340be534a3f \
rmd160 3754861ad0550f9d77b0aa745dcb3d394ec658ed

+depends_build port:pkgconfig
depends_lib port:gettext \
port:libiconv

@@ -34,7 +35,7 @@
test.target check

variant doc description {Install extra documentation} {
- depends_build port:doxygen
+ depends_build-append port:doxygen
configure.args-delete --disable-docs
}