package/ti-cgt-pru: specify need for 32-bit host libraries

Fixes:
http://autobuild.buildroot.net/results/787/7875507cc1009c9a495695f9d9ecb974530a3f72

The downloaded source for the ti-cgt-pru package is an installer that
requires 32-bit host libraries for extraction. Specify this dependency
in the package configuration [1].

[1] http://lists.busybox.net/pipermail/buildroot/2020-January/271416.html

Signed-off-by: Ash Charles <ashcharles@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
(cherry picked from commit efea700bb80f3d695be1fb99d5da5a00a98c1d96)
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/ti-cgt-pru/Config.in.host

@@ -7,6 +7,7 @@ config BR2_PACKAGE_HOST_TI_CGT_PRU_ARCH_SUPPORTS
 config BR2_PACKAGE_HOST_TI_CGT_PRU
 	bool "host ti-cgt-pru"
 	depends on BR2_PACKAGE_HOST_TI_CGT_PRU_ARCH_SUPPORTS
+	select BR2_HOSTARCH_NEEDS_IA32_LIBS
 	help
 	  This package provides the Code Generation Tools for the PRU
 	  unit found on some TI processors e.g. AM3358.