wxWidgets3.1: test switching to -j1 in CI

mingw-w64-wxWidgets3.1/PKGBUILD

@@ -19,7 +19,7 @@ _wx_buildver=
 pkgbase=mingw-w64-${_basename}${_wx_basever}
 pkgname="${MINGW_PACKAGE_PREFIX}-${_realname}${_wx_basever}"
 pkgver=${_wx_basever}.5
-pkgrel=1
+pkgrel=2
 pkgdesc="A C++ library that lets developers create applications for Windows, Linux and UNIX (mingw-w64)"
 arch=('any')
 mingw_arch=('mingw32' 'mingw64' 'ucrt64' 'clang64' 'clang32')
@@ -106,6 +106,11 @@ build() {
 
   #echo "_debug_options := ${_debug_options[@]}"
 
+  # Hack for clang32 in CI
+  if [[ -n "${CI}" && "${MSYSTEM}" == "CLANG32" ]]; then
+    unset MAKEFLAGS
+  fi
+
   [[ -d "${srcdir}"/build-${CARCH}-shared ]] && rm -rf "${srcdir}"/build-${CARCH}-shared
   mkdir -p "${srcdir}"/build-${CARCH}-shared && cd "${srcdir}"/build-${CARCH}-shared