If the system has an old dev-libs/protobuf-2* installed, then it will
not be upgraded before protobuf-c tries to compile, which leads to
error:
```
t/issue330/issue330.protot/issue330/issue330.proto:1:10:
Unrecognized syntax identifier "proto3".
This parser only recognizes "proto2".
```
Signed-off-by: Robin H. Johnson <robbat2@gentoo.org>
IUSE="static-libs test"
RESTRICT="!test? ( test )"
-BDEPEND="dev-libs/protobuf:0
+BDEPEND=">=dev-libs/protobuf-3:0
virtual/pkgconfig[${MULTILIB_USEDEP}]"
-DEPEND="dev-libs/protobuf:0=[${MULTILIB_USEDEP}]"
+DEPEND=">=dev-libs/protobuf-3:0=[${MULTILIB_USEDEP}]"
RDEPEND="${DEPEND}"
S="${WORKDIR}/${MY_P}"