Fix restarting after a complete build

It is much, much better to *first* make the directory writable and *then*
do a test for case-sensitivity (which requires writing in that directory).

Fixes #1033.

Signed-off-by: Alexey Neyman <stilor@att.net>

scripts/crosstool-NG.sh

@@ -304,15 +304,15 @@ CT_DoExecLog ALL mkdir -p "${CT_HOST_COMPLIBS_DIR}"
 # Only create the state dir if asked for a restartable build
 [ -n "${CT_DEBUG_CT_SAVE_STEPS}" ] && CT_DoExecLog ALL mkdir -p "${CT_STATE_DIR}"
 
+# Kludge: CT_PREFIX_DIR might have grown read-only if
+# the previous build was successful.
+CT_DoExecLog ALL chmod -R u+w "${CT_PREFIX_DIR}"
+
 # Check install file system case-sensitiveness
 CT_DoExecLog DEBUG touch "${CT_PREFIX_DIR}/foo"
 CT_TestAndAbort "Your file system in '${CT_PREFIX_DIR}' is *not* case-sensitive!" -f "${CT_PREFIX_DIR}/FOO"
 CT_DoExecLog DEBUG rm -f "${CT_PREFIX_DIR}/foo"
 
-# Kludge: CT_PREFIX_DIR might have grown read-only if
-# the previous build was successful.
-CT_DoExecLog ALL chmod -R u+w "${CT_PREFIX_DIR}"
-
 # Setting up the rest of the environment only if not restarting
 if [ -z "${CT_RESTART}" ]; then
     # Having .. inside CT_PREFIX breaks relocatability.