scripts/functions: introduce target_bits_32 and target_bits_64 variables

These variables behave the same for bitness as their counterparts do
for endianness: they are defined to the appropriate bitness.

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Cc: Cody P Schafer <dev@codyps.com>

scripts/functions

@@ -1154,6 +1154,18 @@ CT_DoBuildTargetTuple() {
             ;;
     esac
 
+    # Set the bitness suffix
+    case "${CT_ARCH_BITNESS}" in
+        32)
+            target_bits_32=32
+            target_bits_64=
+            ;;
+        64)
+            target_bits_32=
+            target_bits_64=64
+            ;;
+    esac
+
     # Build the default architecture tuple part
     CT_TARGET_ARCH="${CT_ARCH}${CT_ARCH_SUFFIX}"