fix(st): set no-pie option when building ST elf file

This elf file is used to build a binary file that concatenates BL2 and
its device tree blob. It then does not need PIE option, and this avoids
the following compilation error with some compiler versions:
  error: PHDR segment not covered by LOAD segment

Signed-off-by: Yann Gautier <yann.gautier@st.com>
Change-Id: I7562e8c1890275fe0409f3a23cc66a8e14ea1ee0
1 file changed