python3-pandas: rebuild for missing symbol, disable parallel builds

An intermittent "missing symbol" problem, together with recent i686
failures, suggests that there may be a race in the build.

srcpkgs/python3-pandas/template

@@ -1,7 +1,7 @@
 # Template file for 'python3-pandas'
 pkgname=python3-pandas
 version=1.5.0
-revision=1
+revision=2
 wrksrc="pandas-${version}"
 build_style=python3-module
 hostmakedepends="python3-setuptools python3-Cython python3-numpy"
@@ -15,24 +15,18 @@ homepage="https://pandas.pydata.org/"
 changelog="https://pandas.pydata.org/pandas-docs/stable/whatsnew/index.html"
 distfiles="https://github.com/pandas-dev/pandas/archive/v${version}.tar.gz"
 checksum=ab23595e2105e2595b14c37f5e88a24d065eb60432e9f45c78f8613ba956eacd
-
-# Try to avoid an intermittent i686 build failure
-# https://build.voidlinux.org/builders/i686_builder/builds/39813/steps/shell_3/logs/stdio
-case "$XBPS_TARGET_MACHINE" in
-	i686*) disable_parallel_build=yes ;;
-esac
+# Builds seem to sometimes have missing symbol problems;
+# the intermittent nature suggests this might be a race
+disable_parallel_build=yes
 
 pre_build() {
-	# Try to avoid the aforementioned intermittent i686 build failure
+	# Try to avoid i686 build failure
 	case "$XBPS_TARGET_MACHINE" in
 		i686*)
 			CFLAGS="${CFLAGS// -g/ -g1}"
 			CXXFLAGS="${CXXFLAGS// -g/ -g1}"
 			;;
 	esac
-
-	# setup.py allows a -j argument to parallelize builds
-	make_build_args+=" ${makejobs}"
 }
 
 do_check() {