curl.h: remove the execution bit

The execution bit of curl.h file was wrongly added:

  commit 2621025d6f96 ("curl.h: <sys/select.h> is supported by VxWorks7")

and should be removed.

Follow-up to 2621025d6f96 ("curl.h: <sys/select.h> is supported by VxWorks7")
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Closes #7286

diff --git a/include/curl/curl.h b/include/curl/curl.h
old mode 100755 (executable)
new mode 100644 (file)