Accept TABs in gcc/config/arc/arc-cpus.def

File gcc/gcc/config/arc/arc-cpus.def is used to determine valid CPU models
for this GCC version. However, this stopped working with a recent commit to
GCC where tabs were added to this file and previous AWK field separator
haven't treated them properly.

Signed-off-by: Anton Kolesov <[email protected]>

Author: anthony-kolesov

build-all.sh

@@ -1001,8 +1001,8 @@ cpus_def=$ARC_GNU/gcc/gcc/config/arc/arc-cpus.def
 if [ -f $cpus_def ]; then
     # New GCC (2016.03 and later).
     # allowed_cpus should be a string wil values delimited by spaces.
-    allowed_cpus=$(awk -v FS="[(, ]+" '/^ARC/{printf " "$2}' $cpus_def)
-    allowed_linux_cpus=$(awk -v FS="[(, ]+" \
+    allowed_cpus=$(awk -v FS="[(, \t]+" '/^ARC/{printf " "$2}' $cpus_def)
+    allowed_linux_cpus=$(awk -v FS="[(, \t]+" \
 	'/^ARC/{if($3=="hs"||$3=="700")printf " "$2}' $cpus_def)
 else
     # Old GCC (2015.12 and earlier)