Merge "configure.sh: prefer 'which' over 'hash'"

build/make/configure.sh

@@ -1069,7 +1069,7 @@ EOF
           if enabled rvct; then
             # Check if we have CodeSourcery GCC in PATH. Needed for
             # libraries
-            hash arm-none-linux-gnueabi-gcc 2>&- || \
+            which arm-none-linux-gnueabi-gcc 2>&- || \
               die "Couldn't find CodeSourcery GCC from PATH"
 
             # Use armcc as a linker to enable translation of