srcpkgs: require protobuf>=2.6 for building.

srcpkgs/mixxx/template

@@ -3,7 +3,7 @@ pkgname=mixxx
 version=1.11.0
 revision=4
 hostmakedepends="scons pkg-config"
-makedepends="qt-devel portaudio-devel libusb-devel libmad-devel protobuf-devel
+makedepends="qt-devel portaudio-devel libusb-devel libmad-devel protobuf-devel>=2.6
  libid3tag-devel libvorbis-devel libflac-devel glu-devel taglib-devel
  libsndfile-devel portmidi-devel vamp-plugin-sdk-devel faad2-devel
  libmp4v2-devel"

srcpkgs/mosh/template

@@ -4,7 +4,7 @@ version=1.2.4
 revision=4
 build_style=gnu-configure
 hostmakedepends="automake pkg-config git"
-makedepends="ncurses-devel protobuf-devel libutempter-devel libressl-devel perl-IO-Tty"
+makedepends="ncurses-devel protobuf-devel>=2.6 libutempter-devel libressl-devel perl-IO-Tty"
 depends="perl-IO-Tty"
 short_desc="MObile SHell"
 maintainer="Juan RP <xtraeme@gmail.com>"

srcpkgs/mumble/template

@@ -4,7 +4,7 @@ version=1.2.8
 revision=2
 hostmakedepends="pkg-config"
 makedepends="
- libcap-devel Ice-devel>=3.5 protobuf-devel libXi-devel qt-devel libressl-devel
+ libcap-devel Ice-devel>=3.5 protobuf-devel>=2.6 libXi-devel qt-devel libressl-devel
  speex-devel libsndfile-devel libX11-devel alsa-lib-devel pulseaudio-devel
  avahi-compat-libs-devel MesaLib-devel opus-devel libogg-devel boost-devel"
 depends="qt-plugin-sqlite desktop-file-utils hicolor-icon-theme"

srcpkgs/zbackup/template

@@ -3,8 +3,8 @@ pkgname=zbackup
 version=1.3
 revision=2
 build_style=cmake
-hostmakedepends="cmake protobuf-devel"
-makedepends="zlib-devel liblzma-devel protobuf-devel libressl-devel"
+hostmakedepends="cmake protobuf>=2.6"
+makedepends="zlib-devel liblzma-devel protobuf-devel>=2.6 libressl-devel"
 short_desc="A versatile deduplicating backup tool"
 maintainer="Juan RP <xtraeme@gmail.com>"
 license="GPL-2"