Define TM_MULTILIB_CONFIG for ARM multilib

TM_MULTILIB_CONFIG is not set in config.gcc when building with multilib
for arm targets, leading to config/arm/t-multilib not including any of
the files (t-aprofile and t-rmprofile) definining the architecture and
FPU to build multilib for. This patch fixes that by setting
TM_MULTILIB_CONFIG to with_multilib_list's value after it has been
checked. It also fix a trailing whitespace issue.

2017-05-08  Thomas Preud'homme  <thomas.preudhomme@arm.com>

    gcc/
    * config.gcc (arm*-*-*): Set TM_MULTILIB_CONFIG from
    with_multilib_list after it has been checked.

From-SVN: r247741

gcc/ChangeLog

+2017-05-08  Thomas Preud'homme  <thomas.preudhomme@arm.com>
+
+	* config.gcc (arm*-*-*): Set TM_MULTILIB_CONFIG from
+	with_multilib_list after it has been checked.
+
 2017-05-08  Richard Biener  <rguenther@suse.de>
 
 	* tree-ssa-pre.c (bitmap_set_and): Avoid bitmap copy.

gcc/config.gcc

@@ -3820,6 +3820,7 @@ case "${target}" in
 				fi
 
 				tmake_file="${tmake_file} ${tmake_profile_file}"
+				TM_MULTILIB_CONFIG="$with_multilib_list"
 			fi
 		fi
 		;;