Fix curlbuild error in polybar

curlbuild.patch

diff -ura a/src/utils/http.cpp b/src/utils/http.cpp
--- a/src/utils/http.cpp        2017-08-06 14:33:25.826861007 +0200
+++ b/src/utils/http.cpp        2017-08-06 14:33:46.873532772 +0200
@@ -1,5 +1,4 @@
 #include <curl/curl.h>
-#include <curl/curlbuild.h>
 #include <curl/easy.h>
 #include <sstream>

PKGBUILD

# Maintainer: Michael Carlberg <[email protected]>
# Contributor: Michael Carlberg <[email protected]>
pkgname=polybar
pkgver=3.0.5
pkgrel=2
pkgdesc="A fast and easy-to-use status bar"
arch=("i686" "x86_64")
url="https://github.com/jaagr/polybar"
license=("MIT")
depends=("cairo" "xcb-util-image" "xcb-util-wm" "xcb-util-xrm")
optdepends=("alsa-lib: volume module support"
            "libmpdclient: mpd module support"
            "wireless_tools: network module support"
            "jsoncpp: i3 module support"
            "i3ipc-glib-git: i3 module support"
            "ttf-unifont: Font used in example config"
            "siji-git: Font used in example config"
            "curl: github module support")
makedepends=("clang" "cmake" "git" "python" "python2" "pkg-config")
conflicts=("polybar-git")
install="${pkgname}.install"
source=("${pkgname}::git+${url}.git#tag=${pkgver}" "curlbuild.patch")
md5sums=('SKIP'
         '653ab1fc31142527535209df7fae251a')

prepare() {
  git -C "${pkgname}" submodule update --init --recursive
  cd ${pkgname}
  patch -p1 -i ${srcdir}/curlbuild.patch
  mkdir -p "${srcdir}/${pkgname}/build"
}

build() {
  cd "${srcdir}/${pkgname}/build" || exit 1
  cmake -DCMAKE_INSTALL_PREFIX=/usr -DCMAKE_C_COMPILER="clang" -DCMAKE_CXX_COMPILER="clang++" ..
  cmake --build .
}

package() {
  cmake --build "${pkgname}/build" --target install -- DESTDIR="${pkgdir}"
  install -Dm644 "${pkgname}/LICENSE" "${pkgdir}/usr/share/licenses/${pkgname}/LICENSE"
}

polybar.install

post_install() {
  cat << EOF

  Get started with the example configuration:

    $ install -Dm644 /usr/share/doc/polybar/config \$HOME/.config/polybar/config
    $ polybar example

  For more information, see https://github.com/jaagr/polybar/wiki

EOF
}

post_upgrade() {
  [ "$(vercmp "$2" "2.5.1-1")" = "-1" ] || exit 0
  cat << EOF

  The % suffix has been removed from percentage tokens.
  The suffix is instead added by the user, for example:

  format-charging = Capacity %percentage%%

                                              -- jaagr

EOF
}