GitLab

In the Makefile we use findstring to locate gcc toolchains
that have PIE enabled by default.

Unfortunately the result of findstring is compared against
an integer, 1, rather than a non-empty string; the logic to
disable PIE then doesn't get applied.

This patch fixes the flag test.

Fixes: f7ec31db

 ("Disable PIE compilation option")
Change-Id: I4cd2866974e313d6b408f9681311d78a208ab468
Signed-off-by: Steve Capper <steve.capper@arm.com>